I've only done character-specific ones, generally spellcasters, basically created their spellbook, and had a Forms supplement - a must for any druid, or any wizard/sorc who has alter self or shapechange. The cleric gets the printout of the turning rules.
If I was going to pull things out of the PHB, I'd say Grapple rules (hell, the entire special action section), the Type of Action chart (standard, full, etc) and whether they caues AoOs. Maybe the overland movement chart and the weapons chart.
From skills: Jump, Tumble, Spellcraft, Ride, Survival (if you have a tracker), Concentration.