We always, and I do this with other girls I work with also, start with overhand long toss. After we get stretched out as far as my back yard fence will allow(about 85ft) we come back to 35ft and begin doing underhand long toss until reaching fence again. Then we usually move to doing walkthroughs. After about 10 walkthroughs we begin pitchin, only doing drills when something needs to be corrected or a new concept introduced. We don't go by pitch counts but whole workout lasts about 45 min.