My biggest tip is to SHUT UP. My first couple of years I called way too much, hard not to when that Tom is gobbling his darn head off at you. But they'll hang up and then you'll want to call more and more and more and more. The best advice I can give is to just shut up and when you do call, call very quiet they'll think the hen is leaving and could come in. I called a couple birds in last year that I'm pretty sure I would have over called to in the past.