Hmm, whe I get high I don't like going to town at all - cos you're all worried that ppl will notice that you're high - that's just ruins it for me. I love to be safe and comfy in the walls of my house. So that's what I like to do:
1) Watch TV. Sure sounds all the same boring ol' thing to do, but you never know what you'll find funny on TV to laugh at. This one time me and my buddy were baked, flipping through channels, funny thing we got this mind antenna - and always stop at the same channel that we think is interesting (even if not high). So we got this news channel there was an interview of this politician, this dude was speaking with no emotion on the same exact tone all the time. When reporter asked him questions, he just started his monotonous rambling, then stop as if someone pushed a pause button, and resume after another question. We laughed our asses off for good 20-30 mins. but whn I feel the TV is getting boring, I choose not to loose a good high and switch activity.
2) Listening to music - can NEVER get tired of that! Modern techno, raggae-dub, and other stuff would do just fine. some music is so influential at times - it sends freaking chills (good ones) down my spine - that way on top of that high you get a super euphoria kick that blows your top - I'm sure yall know what I mean
3) moving around. When the music is on - I like to sorta dance (usually techno) - since you got that body buzz, the movement makes you feel that body buzz even more.
4) Just walking around. I'll never forget the phrase my buddy said when I was high sitting on the couch : "hey man, try walking around - it's fun" LOL
5) When I'm baked, sometimes it's coo, to walk on the street a bit - Usually I wanna get some snacks at the gas station nearby, when you're around your peak high - the walking seems so surreal - it's like you're playing a 1st person shooter game, and your pc staggers, so instead of smooth movement you get this frame-by-frame vision Trying to buy the snacks is kinda fun too - trying to remember what to say, and say it the right way, get the cash/card in time and shit - it's like accomplishing tasks - but not tripping much about it
6) When I get high by myself - I like analysing stuff. Sure sounds boring - but the process is fun anyways - I like to close my eyes and visualize something, then slovly develop the visual representation of whatever, and then "admire" your accomplishment. E.G. I was drawing some buildings in Photoshop, and I needed to draw golden color, I couldn't figure out how, so I got high, imagined a building with golden dome, then slowly saturized the color in my mind, zoomed in, and could perfectly visualize that gold is just a gradient between yellow and brown - turnd out pretty well in my drawing. There are tons of examples of how I use my mind to solve some cewel and weired things.

Sorry for rambling on, I just wanted to share the things I like best doing when high