What cq do you have ?
Do;
Stay out of the way of other faster cars, use your indicators to let them know you have seen them up your arse and will be pulling over. Use your mirrors more than on the road.
Take the first couple of laps nice and slow and gradually build you speed.
Use a good quality engine oil, some of us are using 10-60 or 15-50 fully synthetic, normal 10-40 Asda crap will be too thin after a few laps.
Watch your water and oil temps, remember there is no oil cooler on the non turbo so it will get very hot quickly.
Have a cool down lap before you go into the pits, not too slow, just avoid hard acceleration and braking.
Think about fitting a by-pass switch for the rad fan, this way you can check the fan works but also give you a chance of saving the engine if it starts to get too hot.
Pass other cars with plenty of room and give them a good distance coming into a corner, if you are faster than them try to wait until they have seen you and they are going to let you pass.
Check the wheel alignment (tracking), you will need a 4 wheel alignment place but this will make a big difference.
Do all the braking before the corners and always in a straight line, keep a steady throttle around the corner and let the car run wide.
Remove all the crap out of the car, even the CD'S and the like, the less stuff there is rattling around the better, look under the seats, you will subjecting the car to a lot of G force compared to 'normal' road driving. If it ain't bolted down leave it in the pits.
Don't;
Spend more than 15-20mis on track at a time, go into the pits and check tyre temps and just give the car a break, Re-the advise about the brakes in the pits.
Don't try to catch up with that Subaru who is faster than you, you may be as good in the corners but don't be tempted to rev the nuts of the engine to try and keep up on the straights.
Wear high heels
but seriously baggy clothing, stiff shoes, watches, etc,
Brake around corners or use heavy acceleration into them. The coupe may try to under-steer a lot but if you plan well ahead and don't turn the wheel too sharp she will go around the corners as good as small Japanese rot box
Don't spend all your money on mods, tyres, go faster bits without buying something for the missus
Take spare fuel so you don't have loads in the tank around the track.
Last but not least, TAKE SOME PICTURES, or even better some video
