Hey guys, I purchased a new bike for christmas and have been out 3 or 4 times now. I'm still new to cycling and want to know what accessories are "essential" and what you ride with?

Flat kits? Tools? Bottles and Cages? Lights? Bags? etc.

I've about spend all my money on the bike, so I'm not about to go out and buy it all. What do ride with?