What to look for in a new router?

I am in the market for a new router. However a problem being is I don't know what to look for. Can someone please give me some sort of idea on what is the specs that determine a good router so I can research it properly?

look for good wireless signal you can find out by reading reviews and gigabit ethernet 

this is a good one all around


This video from Tek Syndicate shows you how to turn an old computer into a router.