1.pick the broad heads you plan on hunting with and either get a second set of blades or practice blades and practice with broad heads .they might not hit the exact same place your field points do.
alot of broad head companys claim "flys LIKE a field point" that doesn't mean they will hit WHERE a field point does.
2. like said in the above post. sit as long as you can stand it and then sit some more. alot of deer are killed in the middle of the day.if you can hunt the peak of the rut plan on sitting allday.you never know when a buck will be chaseing does.
3.dont worry about a call. they will do more harm then good if you dont know how and when to use them. just sit as quite as posible and be safe. if your not used to being in a tree stand for a long time were a saftey harness.it can and will save your butt.