1. Define your profile
Define the knowledge you offer, the need you have and the ideas and projects you may have in mind.
2. Search and Talk
Search for people near you and start talking with them before exchanging.
3. Be accountable
Do what you said you were going to do, when you said you’d do it.
Share what are you doing in your wall or your items (knowledges, needs & projects wall).
5. Leave feedback
give positive feedback when you pay for the help. That will increase his reputation.