• Living with your CPAP machine: 5 Top Tips
  • Tip #3: LEARN ALL YOU CAN ABOUT THE CPAP
• FAQs - Common CPAP Problems and their Solutions
• CPAP machines: Tips for avoiding 10 common problems [Mayo Clinic]
  • more from MayoClinic.com
• Compendium of CPAP Treatment Problems and Solutions
• Top 10 CPAP Compliance Solutions [about.com]
• good mix of doctor-oriented and patient-oriented advice [pdf]
• community/forums
  • talkaboutsleep.com [forum]
  • cpaptalk.com [forum]
  • apneasupport.org [forum]
  • apneaboard.com [forum]

Some CPAP machines keep an internal report, to give the doctor information about compliance:

• How to Read a CPAP Compliance Report
• explaining the need for a "compliance download" to the patient
• examples of manuals describing how to do a "compliance download": [1]

Random other info:

• "The best data suggest that a 10% reduction in weight leads to a 26% reduction in the respiratory disturbance index (RDI)."