There are many methods to solve the cube, but most "fast" speedcubers use one of the three methods listed above. Go ahead and read about each. :) 

If you're a beginner and decide to give Fridrich a shot, the guide to the right should give you a place to start.

For the other two methods, these are the creators' websites: Roux, Petrus.

Quest to Full Fridrich:

Beginner's Method
Keyhole Method
Intuitive F2L
2-Look OLL and 2-Look PLL  
PLL Algorithm Bank [21 Algorithms.]
OLL Algorithm Bank [57 Algorithms.]

Here are the OLLs and PLLs I use.