-Heatware for hardware transactions (Not directly Bitcoin related, but a good rep/feedback based site)
Build trust by being active and helpful in the community. Until you establish trust, offer to take the risk side of trades (sending first) but at the same time, only deal with reputable members to minimize that risk.
Find/create an idea/service/product "we can't live without" and sell it to help create a name for yourself.
And, Welcome to the forums!