Now that I think about it...

When I first started playing I would always mind-fuck myself by depositing 50, playing NL10, loose a couple hands and think "If I can just get back to what I started with I'm good." Of course I would be trying to over bet pots, get caught on obvious bluffs and generally play like shit. I think I read something like this in "Super System" by Doyle Brunson. (I'd look it up but i'm just too damn lazy.)

Once you sit down at a table you should always think of that money already gone.

Something on those lines. God, How I can be such a donk sometimes.