learn the yelp, purr, & cluck first. When calling blind, mix and match these calls. Try watching as many hunting tapes as you can and try to mimic them with these calls. JMO, when you have a tom comming in, or are trying to call in some hens so the Toms follow, do a lot of purring. The purr is a sign of contentness. Just practice and research as much as you can. Mix that with some good scouting (know where the birds roost, fly down, feed, strut) and you will be fine. good luck