what are all the little thing that i can do to tune up my car?

 

Maintenance:

Transmission fluid every 60k
Timing belt
Water pump
Compression test
New spark plugs
Spark plug wires
No check engine lights

Only when your maintenance is perfect, can you start to modify.

After you've done things like Intake, header, catback, the next steps are extremely costly. Even after all that the car will still be painfully slow.