I agree that Mildot Master works great! I play around with it quite a bit just to get it into my head.
As a side note there is a pretty good article in Predator Xtreme this month about a guy that makes lifesize coyote targets with a steel plated vital area. I picked up some scrap plywood today and am going to make a couple of these targets. I think they would be great over the summer to plink on to get to know the scope, wind, etc. I don't mind punching paper but these would be fun to use in the off season set at different ranges.