Special 900 Number Tips

Let Callers Dial Direct - Don't rely on Extension lines
Avoid shared 900 numbers that require callers to dial an extension to reach your service. This can result in misdialed numbers and greater difficulties in resolving billing disputes.

Reputable Service Bureau
You should find a reputable service bureau who has many years of experience in the industry. Also one with a clean Better Business Bureau track record.

Other Sources for Help

The following books are recommended:

900-Know How

Money Making 900 Numbers