This is not meant to promote any particular website or chain. I am not sponsored by anyone(although that would be Most Excellent), simply providing my views on the subject.
That being said, on with the purpose of the blog, which is not to spend all your hard-earned money on a place to lay your head at the end of a day of travel or sightseeing. It can get expensive. You can be brand-loyal and stay only at the chains you have piled up the Rewards points such as Hilton or Marriott and earn upgrades and free stays. If you travel a lot for business and your company allows you to keep the points for personal use, who wouldn't want to take advantage of free rooms when on vacation? Word to the wise, however, not every chain in the US offers the same style of room you expect in the US. It can be more like booking a Best Western--one place you pay $40 a night for a 4-star room and another you spend $70 and are thankful the sheets and towels are clean(although I understand BW now has a system to separate the bare bones from the pillowtop plush) so be sure to peruse Trip Advisor as well as the motel website to make sure you are getting what you expect.
Another thing is that pillowtops are not standard in most motels in the UK. You barely find them in those $300/night rooms in London. And while you are choking on the aforementioned price, let me say that is an average price for an average room in the summer. Want that Hilton/Omni/Marriott experience? Expect to pay half again more. And you might get a Queen sized mattress. Kings are as hard to find, so get used to doubling up on that Double most of us had when we first got married because it was affordable. At least it will be pillowtop!
So, I would spend hours on Trip Advisor or hotels.com or comparable booking sites looking for deals. Sometimes I would find them. Maybe they weren't the Hilton, but were at least 1/3 the price and were comfortable enough and close to where I wanted to be. As always, if you are familiar with an area's transit system cost is directly proportional to how close you are to an attraction.
Then a friend of ours introduced us to the wonders of airbnb.com and couchsurfing.com. All of a sudden a world of possibilities opened before us. Now we could stay with people who lived in the area and have a better immersion into a culture. With airbnb the experiences can be varied-- you could be handed the keys to a flat or home and with the exception of a binder in several languages which advise you where to go and what to see, or you could be in a room in someone's home with an atmosphere more like a regular bed and breakfast with breakfast included and very social hosts who want to learn as much about you and your interests as you about theirs. The costs are generally cheaper than a regular b&b, and more personal. You often have to share a bathroom, something common in many smaller hotels, so that's another thing. If you don't want to share a bathroom, book only 'en-suite' rooms. Couchsurfing is the cheapest as this is a free service and you are as likely to end up on a floor or a couch as you are a bed and sharing a bath and this is all that is offered. While I have not couchsurfed myself, my husband and I recently played host to a frequent surfer. Apparently most of her experiences have included being fed most meals by her hosts, being taken on tours, being offered bicycles, etc. Lucky her. My understanding was that most of the people taking advantage of a free place to stay would do things like cook a meal for you or bring you a bottle of wine as a thank you for hosting them, or were expecting no more than a place to flop and a little conversation and direction of what to see and do and otherwise were left to their own devices. So, if you decide to try this route, expect the bare minimum and don't make your hosts feel put upon to entertain you. Both sites allow you the opportunity to review not only the places you stay but also the people who stay with you so that you have the right of refusal based on previous write ups or at least know who you are inviting into your home before they arrive. Read those reviews before booking, especially the most recent. Sometimes you will find a few less than stellar reviews at the start but they improve as the airbnb hosts strive to be more accomodating and in some cases, better housekeepers!
Glamping is another way to travel and save money. Essentially you are offered an enclosed no-frills room or cabin with which to throw down your pad and sleeping bag. Main plus is you don't have to worry about being eaten alive by mosquitoes or midges or getting rained on. If you are lucky, there is a covered area to set up a camp stove or grill or there are charcoal grills available to use. Most have a central shower area, all have toilet access. Some have individual units to which you are given a key so you can lock your stuff up while you are out exploring but aren't necessarily patrolled so keep that in mind if you do have anything of real value.
A number of hostels have similar setups, offering you a communal space or bedroom with as many as 9 other people sharing that space. Most offer single or bunkbed accomodations and communal toilets and showers, some offer lockers or trunks to store your things but many of those expect you to provide your own lock. Hostels are more likely to appeal to younger people, and many offer breakfast either included or for a nominal charge.
Eating out will also take a major chunk out of your vacation budget, so consider staying in places which offer room refrigerators. This is especially important if you will be based in one spot for a number of days. Pick up some fruit, deli meats and cheeses as well as bread and condiments and you are set. As an alternative, many grocery and convenience stores offer 'Meal Deals' where you can get a bottled drink, sandwich, and chips or candy bar for a nominal price, perfect for picnics in a park or to eat on your transit commute.
Speaking of transits, the UK and Europe offer 'two-fer' and family deals on trains and buses. Sometimes you can find multi-use packages for a week or a month. Attractions do the same. If you like storming castles and other historical sites, consider purchasing a week or annual pass to a Heritage or National Trust organization. You can save a bunch of money that way, especially if you travel with the family.
Now that you've saved hundreds on your trip, you can spend all that loot on the really important stuff--farmhouse ciders and souvenirs!
Have fun...