Right now, I'm feeling rather melencholy. It's finals week, what do you expect? But in a few days, I'll feel quite happy and relieved when it's all over.
Just don't do it. Smoke is such an unattractive smell and it kills the vibe a lot. It's also bad for your lungs and it give you bad breath.
Now smoking weed is alright, as long as it's just a couple of times per week I think. I also support medical marijuana.
Listening to music always helps and thinking about fun stuff while listening to music help more I think. Also doing a lot of writing reduces anxiety a bit from my experience.