-Cannabis use in an environment where I know I'll have an awkward introverted high aftwards
-Excessive alcohol intake when I know I need to be up early in the morning
-Coming up with incredibly inventive forms of procrastination when dealing with an academic deadline
-Not sleeping enough at night
Probably a few more there, but those are the big ones that come to mind at the moment.
Except the Cannabis use bit, this. Also what Alcon said, which is strange given that usually I'm most introverted person I know but occasionally... (and not even when Alcohol is involved. Actually then, I tend to be more careful....).
