Use the Rad Alt. If your airline has auto RA call out for 50/40/30/20 and 10, it's easy.
For guys new I would advise when you hear 50, wake up. 40, start getting ready. 30 begin a very, very slight back-stick, looking at the OTHER end of the rwy. The nose should barely be rising. at 20, just slow the nose rise a little, and at 10, hold the nose absolutely still.
With any luck, you'll feel the wheels kiss.
Simples.