Oh yeah…. forgot to mention…. you can get some sweet freebies at most cons. SDCC is the biggest, but most conventions have something for free.
However, if you pull a routine like Pain, stop and think, WWLD? (What Would Luci Do?) then buy something as well. The companies there spend money to get you the good stuff for free, the least you can do is buy something from them as well.
And that goes double if you’re wandering around an Artists’ Alley.