I need to improve my f2l speed and become consistent because most of the time is consumed by f2l.
The trick to a quick F2L is slow turning and fewer moves, you'll want to have your first two layer done in around 30-35 moves. Try to find nice optimal ways of inserting each pair in whatever slot... but don't use crazy turns that couldn't be done fast (like lots of B's, or turns that make it difficult to see the next pieces (like R2/L2). As a start, don't do more than one cube rotation per F2L pair. If you keep getting a case that you hate, try looking it up on Macky's site, in the
Basic or
advanced sections. (note: he has the Japanese colour scheme, where his blue is in the more standard white position). Don't go crazy trying to memorise those algs, just check when you think that there has to be a better way to do a pair than your current way.
So, nice optimal inserts, slow it down to give yourself thinking time, and then when you're totally happy inserting each type of case, look ahead to the following case.
Takes a lot of time and practice. When you're new it seems like the Last layer is the scary one to do, but it's F2L that takes the most time to learn and get good at.
Good luck.
Here are some example solves by people who are excellent at F2L, you can get lots of tips by following how they solve each pair... also look for reconstructed solves on the forums.
Faz
Rowe
Not sure who
this is, or what language it is, but there are some great tips in it.
Erik
OK going through Faz and Rowe's videos, they are some fast solves. Don't be too put off by how hard it is to follow, if nothing else, try to get an idea for how they insert the cases (i.e. lots of R U moves, with the odd rotation).