Round figure syndrome

[Kimmo]

I have a problem with round figures.

Scenario 1: I've been winning all night and have $4995. I decide to play a couple of hands before I go to sleep to get to $5000. This never works. Suddenly I notice I'm down to $3100 or worse.

Scenario 2: I have $5200 and hit a losing streak so i drop down to $4900 and panic or get depressed because I dropped below the magic 5k, i desperately try to get back to 5k and there goes my bankroll again.

Scenario 3: I have $580 on table, the action seems to have died and I decide to leave at $600 or if I drop down to $550. Of course I drop down to $545 and soon all my profit has been lost.

I'm sure you get the point. How can I get rid of this?