This is a good article, but since surge protectors should be replaced every year or two (the cheaper it is, the more often it needs to be replaced), do what I do: use regular non-surge-protector power strips, and plug them into a good surge block thingy (like
this) that plugs directly into the wall. Then every year you just replace the wall thingy, and don't have to replace the more expensive power strips, if you even need a power strip: the linked device turns a 2-plug outlet into a 6-plug outlet.