Hello, how can i keep myself updated with coins that are pre mined or those having airdrops? 
Thanks. Newbie here
Thanks. Newbie here
There've been many good recommendations here already, but I can add that 1. it is not possible to stay updated on everything without it being a full-time job, 2. you can check out the profiles of popular users on Bitcointalk and read their posts to get an idea of what's going on through various perspectives.
And even if you spend 8 hours on this forum and reading other websites about altcoins you will miss a lot. there is just to many happening to know all what is going on.
Well for you is not that hard. You just try to get some free coins. so just check ANN specially of threads that have little posts and that means they just started. But coins that are given away fro free are usually not worth much.