On a slightly different tack, if you fill up a PA28 and have two people up front, you will very likely be out of the forward CofG limit, which is why it can need quite a heave in the flare sometimes. Bung 50 kg or so in the back luggage compartment and it gets much easier
.
Fuel balance - look at the gauges every now and then and when one gets visibly lower than the other, change tanks. If you're a fat bastard like me you might want to keep the right tank a bit fuller to balance the belly out.
The only real problem you will have is if you never look at the gauges and let one tank run dry
, otherwise you'll just wonder why the aircraft keeps wanting to roll.