http://lmgtfy.com/?q=bitcoin+pool+hoppingIt's pretty much fallen by the wayside as almost all pools today are now hop-proof.
I see you've created a bunch of threads, and they're all concerned about how to get more BTC out of your hardware. We've all been there, but there are only a few things you can do.
1) Optimize your settings. Make sure you're using the right mining software, kernels, flags, etc.
2) Overclock. When done right, this won't hurt your cards at all.
3) Buy new cards. Costs money.
4) Buy FPGA/ASICs. Costs money.
5) Give it time! 0.3BTC/day might not seem like a lot, but in a month, you'll have 10BTC.