You don't use algorithms. I know no F2L algorithms (and perhaps therefore I'm not great at it). You just have to try and figure it out for yourself. IT isn't that hard. 
F2L fast is about figuring out the 5-6 things that have to happen to solve everything and then take shortcuts + finger tricks.
I used to do F2L in over a minute as well.
F2L fast is about figuring out the 5-6 things that have to happen to solve everything and then take shortcuts + finger tricks.
I used to do F2L in over a minute as well.