I found a jump on jump off bus tour that took me on a loop of scotland and allowed me to get on and off the bus as many times as I wanted, and then got off at every stop for at least a day if not a couple days.
I brought a tent and never used it.
I hacked the hostel sleeping: by being the last one back to the room every night I never had to worry about the drunk asshole waking me up in the middle of the night. by finding hostels that allow you access to the rooms during the day, I took a good 4 hour nap every afternoon when no one was about.
I ate at bakeries for breakfast / lunch. Plus some fruit or cheese. Which you can carry with you and always have available.
One big meal out at a restaurant every day (or cook a big meal with a group)
Hang out in the lobby in the morning and ask if you can tag along as people head out. (I spent 4 days in the very very north by just asking if I could come).
Ask other people what they liked / didn't like about where they've come from.
Hitch hike.
Hike.
- I saw Sea Otters in a small cove while just bush walking for the day.
Visit Museums - REally really creepy stuffed animals in dense quantities.
I spent several days with a chap from Canada. We got 10 - 1 pound coins, and proceeded to "place a bet" every block all day long while walking around Aberdeen. We bet on number of women in the next block, number of dogs, color of doors, etc. No duplicates on the bets and alternate making them up. We even bet on kids running around a play ground. At the end of the evening the "big winner" got to buy dinner for both of us at a curry joint.