1. Do not begin an engagement until you have acquired business insurance.
  2. Do not begin an engagement until contracts are signed by both parties.
  3. Do  not begin an engagement until you have a list of emergency phone numbers.
  4. Do not begin an engagement until both parties have signed NDAs.
  5. Do not engage if you are unsure if you will bring down the client’s production server.
  6. See #1.  If you bring down a client’s production server, have your resume ready and your lawyer’s phone number because you will most likely be fired or worse, sued.