[Nimmy]

Read sun-tzu, I know it opened my mind about strategy, and I don't mean complex things, just really simple stuff that you simply never thought about =)
play chess a lot, or any of these complex board games, read strategy books, books written by famous generals\ancient leaders, really opens your mind strategy-wise...
but that's just be being a fanatic on these things =),

why I think that trying to make a bot "tired" isn't the right thing is because if you don't "hold the fort" up the ramp, there are 2 other bots that WILL go up since you are only obstructing one of 3, if you are at the buttom of the ramp 2 bots can move you out of the way, and the 3rd can go up (and probably one of the 2 also)

HOWEVER, if you are untop of the ramp, you can block all 3 by simply going forward-reverse on the width of the ramp, noone will dare try to go up, and if they try, well =)
*insert really EVIL looking face here*