Sardines are also a fantastic source of calcium. They're a super food. And sustainable to boot.

Well, not perfectly sustainable:

http://en.wikipedia.org/wiki/Cannery_Row

Seafood watch says they are ok: http://www.montereybayaquarium.org//cr/SeafoodWatch/web/sfw_...

Costco sells Wild Planet brand -- cheap, tasty, and sustainable.

There exist other places where sardines are fished other than that one place that overfished.

Right, that's the "perfectly" part.

I've heard good things and I'm seriously starting to consider adding them to my diet, how do you prepare them?

Tinned sardines gently mashed on toast with a splash of Worcestershire sauce or similar.

They're also good with lemon juice on top if you're not a fan of Worcestershire sauce. Or you can melt cheese on top for a variation of the classic tuna-melt.

Also, if you want to avoid the extra omega 6 fatty acids, get the sardines that are packaged in water or olive oil (which is mostly monounsaturated fatty acids) rather than soybean oil.

Add an egg or two and make Fisherman's eggs. (Random google recipe: http://thingsmybellylikes.com/2013/03/25/fishermans-eggs/ ) Super high-protein and IMO tasty. Add some cheese on top for a bit more flavor.

Personally, I just eat them as a snack or light lunch straight from the can. Or perhaps chopped into bits over a salad. Sometimes I even mix them with a little brown rice.

Mash up with a fork plus half of a raw shallot (diced), optionally a bit of chili powder or black pepper. Spread on toast. Adding some slices of tomato, cucumber, or hard cheese is nice of you have them.

This is one of our fallback lunches/snacks when we haven't made it to the store recently and/or don't have time to cook.

All you need is a few drops of lemon juice.