Frudgal Dad makes a great point on his blog that the drought in California is going to skyrocket produce costs this year, which should inspire many people to take up growing their own. This is the case for us for sure!
I've been reading up on making a square foot garden - a way of economically utilizing space and water resources to produce three crops / square foot. Again, Frugal Dad has a great article about square foot gardening, or "SFG" as it's sometimes called. I wish his site had more follow ups from his previous year's attempt, though!
A great resource for SFG is the Square Foot Gardening website, which has videos and books about the method, as well as lots of info on how far apart to plant certain crops, etc.