Some advice that applies to any manual: Push the clutch all the way down to the floor. Do not get in the habit of pushing it in just enough. You can ease off when you get good and don't make mistakes anymore.
Remember where you are in the H pattern. Pull to the left for 1 and 2 then up and down. Just up and down for 3 and 4. Pull to the right for
5 and 6 (I drive a 5 speed so I am guessing). Reverse is usually way over. You are guaranteed to get 3rd some day when you wanted 5th. Happens to everyone. Be fast on the clutch.
The car may have to more 10 feet before you let the clutch out all the way. With practice this will go down to a couple feet with the gas just off idle.
Practice pushing in the clutch and braking the car to a stop a few times. That way you can concentrate on traffic rather than the gear box. Sometimes you just can't be distracted in traffic. Example: if you put the car in 5rd instead of 3rd, you'll know how to stop, put it in nuetral and take a deep breath, rather than jerking the car bucking and stumbling upto 40 mph.
Since you own an STI find out about corner entry points, apexes, exit points, positive and negative camber, slope, crest of hills and traction.
Enjoy!