I use the 3.5 method as a guide for the monsters they've slain, and any specific CR traps they beat. Then I divide it by the number of PCs and start figuring what awards I'm going to give for role-play, story goals met, and general fun had by all. That second part is wholly subjective, but since I'm DMing I figure I'm the one that gets to be subjective that way.

I also consider all the e-mail and group posting RP that goes on between sessions when figuring that subjective XP award. If we get a lot of session-time eating business taken care of on-line between games, and do it in character, that counts for a lot.
The subjective award is also influenced by how close the PCs are to leveling up. If I think they played well but the formula and initial subjective awards only get them very close to leveling up, I'll probably bump it up enough so they can level. On the other hand, in ten sessions of my current campaign I've also had one session where I award no experience. None. Zero (0) XP. They acted stupid, suffered greatly for it, then went shopping to replace their gear. I couldn't see awarding anything for that.
Because I want quiet time to reflect on things for the subjective award, I figure it after the session based on my notes and then post the totals on our group board. When we started I told everyone I award XP as a group in order to encourage group oriented play. This does mean that the players that are better role-players (in my eyes) suffer a little. However, I've seen the experienced players devoting a great deal of time encouraging the newer players to actually role-play and teaching them rules as needed and options the newer ones hadn't thought of. Whether this comes from my "group think" awarding of XP or not, I don't know. I may just have super fantastic players. But I like the results. And so far I don't think even the best, most experience role-players would have so much more XP over the others to make a difference level-wise.
I also keep a record of how the XP/level progression is going, which at least one playe has expressed gratitude for. One less thing for him to keep up with!
