Note: I use this houserule in all games I'm DMing. On Harvesting/Milking Poison (Houserule), by James Jacobs:
If you want to milk venom from an animal or harvest its poison from a freshly killed animal, make a skill check—Handle Animal for milking or Survival for harvesting. DC = 15 + the animal's CR. On a success, you extract one dose of poison. For each 5 points by which you exceed the target DC you get a 2nd dose. Regardless, you have the standard 5% chance of poisoning yourself unless you have poison use. Poison harvested in this manner remains viable for 24 hours before it spoils—making preserved poison that lasts longer requires Craft checks.
The DC for these Craft checks is equal to the DC of the poison; In addition, the material cost for preserving the poison is equal to 10 gp x HD of the creature x CR (Minimum 1) of the creature.
To clarify sometimes confusing Tumbling rules using Acrobatics, I've found that the following URL is a great example of how I use it. Tumbling with Acrobatics
Deadly Aim works with ranged touch spells as well as ranged weapons, provided the spell is a Ray and deals damage, i.e. Ray of Frost, Scorching Ray, etc. It also works with (Su) and (Sp) abilities provided they meet that same criteria. As a result, Kineticists rejoice!