To achieve all your goals, you'll have to run three sets of screens for a 1) licensed, 2) experienced, and 3) good agent.
The first is easy. Just ask the agent to whip out his license. You can verify the license number with the department of real estate. I've always got mine at the ready, but sadly, it's never left its slot in my wallet.
For the second part, you'll have to do some homework. You can start by looking at the length of the track-record of the agent, shown by the closed transaction records on the MLS.
For the last part, you'll have to follow your gut. Talk with the agent and see how she/he responds. Or, if there's a forum like this, just read his responses to see if they make sense to you and you alone.