Just to confirm: My bread and butter for the last 3 months has been $20 buyin to NL$100. $25 should work just about the same, I'd think.

You have part of it right. Honestly, I don't sit down expecting to move in on any random hand. I'll easily do it if I think I have a decent advantage. I basically just play straight up poker, taking into account the differences in odds that you noted. Typically, I'll camp for the first 2 or 3 orbits at a table, then open my game up as I see people start to fold to my raises. If all you do is camp, then you get no action from the more aware players at the table (in which case you could move...I tend to exploit their passivity instead). Depending on the competition, a session may be mainly about camping (Party & Prima are often here), or I may be able to double and triple up just playing taggy positional poker (CRL sites and sometimes UB).

As far as leaving the table, that's kinda up to you. When I started out with a roll of $300 (playing at this level simply because of the insanely awesome bonuses I found at the time), I'd tend to leave once I built over 1/2 the full buyin, simply because while risking $20 was easy enough, risking $60 on a $300 roll was more than I was willing to lose. Now that I'm comfortable lossing a couple hundred in a given day, I'm likely to stay around 'til the game gets bad or (more often) I have something I need to go do. Most of my sessions tend to be 50-100 hands, two tabling.

I'm going to put together as comprehensive a post as I can on the subject at some point this summer - I haven't yet, so that's why you couldn't find anything. The point is, you're risking a lower amount of your money to win a greater amount than you would playing as a big stack. You don't want to play maniacal poker and move all-in all the time (well, you can, but for advice on that, talk to Rippy...). You're just playing to bring in a bigger bang for your buck.

I don't know if I answered your questions or not...I'll be happy try again if not