To make money, I buy Advanced Catalysts in Asellus Primus to sell in Dahan, and buy Tantalum in Dahan to sell in Asellus Primus. About 15,000 profit round trip in a Hauler, and a very fast single jump trip.
For fun (and to save my ship from sneaky pirates, when you have 80,000 worth of tantalum, you want to be careful), I'm flying my Hauler at 300 m/s with flight assist off, which I find rather challenging at the moment. It is rather amusing - when I was playing as a bounty hunter, a combat oriented role, I never really felt the need to learn FA off advanced tactics. Now that I'm a peaceful, harmless space truck driver, I find myself learning some pretty awesome turns and twists as I try to align my ship to the space station entrance as fast as possible. Basically, this game has quite a bit of hidden depth, but you have to make an effort to discover it.