Keep it cool....don't go higher than 65. Pitch a huge starter (2L or more), or, optimally, wash your yeast cake and repitch it. I use WLP001. This is my main beer I'm experimenting with, I've done it 4-5 times with all sorts of variations. I can tell you that Ahtanum hops will be the thing that'll get you closest to Stone's IPA. They're real hard to find nowadays though. You can still make a great beer with other varieties, but that's what they use, and I notice a distinct difference when I use williamette, amarillo, etc. I use a mesh tea ball which allows you to cram upwards of 1.5 ounces in it. 2 weeks seems to be fine, and I leave the hops in the keg for the life of the beer without problems.