1. Survey your audience, ask specific questions like, would you pay a) $10-20 b) $30-$40 c) 1 million billion of this product

2. Check your competition to see what they're charging (counterpoint: http://en.wikipedia.org/wiki/Blue_Ocean_Strategy)

3. Pick a number (ref: http://network.businessofsoftware.org/video/dharmesh-shah-on... - worth watching in its entirety)

4. Play with specials - this week, we're offering a 30% discount to all new users (better than decreasing the price outright and incurring the wrath of existing users)

5. Model the numbers, at all times, how many licenses do you need at x price point to break even, etc.