This is a good piece from The Next Web/Entrepreneur. Read them all. If some of them don’t make any sense — because they sound like they were written in Greek — “APIs used to be only for the big guys, but now you’re seeing MVPs include APIs,” etc — take five minutes and look up API on Wikipedia and get a sense of what it is.
Pick something from this list that you may have never heard of and learn about it. (I did: Airtime. Interesting.) You’ll definitely have something to chat about at the next cocktail party, but I have a feeling you’ll get a bit more use out of these tips than that.
BTW – API = Application Programming Interface