2 Look OLL
OLL is one of the hardest parts of solving a 3x3 or at least it is for me. I still haven't even memorized all of it. I just use a 2 look system which isn't bad but isn't super fast either. 2 look is a system of solving the OLL in which you use 1 algorithm that is fast and another that will solve the corner orientation. Below you will find the easiest algorithms that you need to learn to be decent at OLL. Even just using this system I have known people to be sub-15.
All images are taken from Anthony Brooks' site Speedcubing101.com
All images are taken from Anthony Brooks' site Speedcubing101.com
Edge Orientation
When you get these cases you can use the F (R U R' U') F' trigger to make the correct orientation with 4 edges correctly as stated below. These algs will only get the case to 4 correctly oriented edges. Not solve the case the correct algs will be posted later.
Corner Orientation
Next you need to solve the corners. There are a total of 7 alg that you will need to learn, memorize, and use often!!