Experience is very limited–we encourage you to give out two points just about every game session. Bennies are much more flexible, and allow you to reward creative players on the spot for their actions.
You should hand out a Benny anytime a player does something particularly clever, finds a very important clue, or generally advances the plot. You should also hand out Bennies for great roleplaying, particularly as it concerns their Hindrances. If a Loyal character jeopardizes his life to save his comrade, he definitely deserves a Benny for his efforts. It never hurts to reward a player for a great line, side-splitting in-game joke, or even a rare serious and dramatic moment.
Average players should get one or two extra Bennies per night. Really good roleplayers may wind up with two to three.
Savage Worlds Deluxe Edition p. 145