What are all the ways to regenerate Action Points?

Solution 1:

So far, I know of the following:

Water. This only works once per day.
Food. This only works once per day. (Note, that some food, such as a Meaty Bone can cause an Infection which could get you killed!)
Drugs. Most drugs will restore AP to full, however, while under the influence, your forum posts will be affected, and there is a chance of addiction. Once you are addicted, if you do not take drugs every day, you will die.
Alcohol. This only works once per day. Drinking will refill your AP gauge, but it will inhibit your ability to perform some tasks, including searching, combat, and posting to the forum. The day after drinking, you will be hungover and unable to consume alcohol.
EMS System. This can only be used if you are not injured. Consumes 1 Battery, restores AP to 5, and instantly injures you.
Dice. Can be used once per day, small chance to restore 1 AP via scales and triples.
Cards. Can be used once per day, small chance to restore 1 AP via aces and queen of hearts, smaller chance of terrifying you.
Siesta Time™ (hero only). The basic version of this house improvement gives you a daily 33% chance of recovering 2 AP per day.

Playing cards can also give 0, 1 or 2 AP.

Coffee can give 4 AP and can be used multiple times on the same day with no negative effects.

Also I've used Siesta a few times and I always got 2 AP.