Oh, and as far as specific techniques: experiment, watch other climbers, ask other climbers, ask for feedback. If you are toproping, you can play around for as long as you'd like and start to learn what works/doesn't work. If you can find someone who is better at these problems than you are, you can both work on the same roof and a little informal coaching can take place. The No Picnic roof would be well suited for this.
Each situation is different, but as a general rule you don't want to start getting contemplative and introspective in the middle of an overhang. The typical 'Gunks roof requires an aggressive, assertive approach.