The Path of the Player
#1 You keep what you kill.
Awards for killing things go evenly to everyone involved in the battle that survived.
Also, if you manage to encounter something nasty whole alone and somehow kill it, you get it all for yourself. (Be warned that attempting to get into trouble by yourself is a VERY foolish strategy.)
#2 Creative thinking will get you EXP.
Yep, you don't have to fight something to get EXP from it. :) In fact I am likely to award more EXP for creative management of situations than management by "pointy end goes in problem".
#3 Per game session awards.
After seeing multiple campaigns do this I am following along.
Each gaming session will be awarded 1/4 the Medium EXP from the Character Advancement Table for the average level of the players at the table during that session.
IE. The game session has 4 characters. Levels 10, 11, 12, and 14. That gives an average of 12 since we can't count partial levels. Consulting the chart here: http://www.d20pfsrd.com/classes/character-advancement we get 220,000xp. 1/4 of that is 55,000xp. Each surviving character would receive that award for that session on top of other rewards.