For starters change the oil, oil filter, fuel filter, service the transmission, rotate the tires. Get the car up on a lift and check the brakes, ball joints & dust covers.
Oil changes every 3k and trans every 12k or 12months is good insurance.
DON'T use Jiffy Lube or Fram oil filters, they are Junk. Go here to find out about filters >>>
http://www.scuderiaciriani.com/rx7/oil_filter_study/
Then push the button on the shift lever that says something like "PERF". It will change the shift point to a higher rpm for more peppieness.
Regards