re: Poker & when do you know your ready to move up?
If you're using a 20 buyin guideline, I suggest not moving up until you have 30. That's because 20 is a minimum. If you play 4NL with an $80 roll and lose even a small amount, BRM says you have to drop back down. If you have 30 buyins, you have a buffer in case you don't win right away.
That said, I'm also fine with taking shots. Just set aside your winnings until you have 1 or 2 buyins, then use that money to get an advance peek at the level you're working to move up to regularly.
And I think it's important to look at win rate, not just the size of your roll. If you're barely above breakeven over a lot of hands, you'll eventually increase your roll enough to move up, but your game probably isn't as ready for the move as it would be if you had won the same amount over a significantly smaller number of hands.