Originally Posted by Ridgerunner

Treat first gear clutch let out different then going into second, third and fourth. Don't let clutch out all in one motion. From the start, give it a little gas, partially let out the clutch about half way or so, once the car starts moving, then let clutch out the rest of the way as you give it some more gas. If you time the final clutch let out while giving it additional gas just right, you will have a smoother take off.

I have had five standards in a row, with the last three a Rx-7, Mr2 Turbo and a Mustang GT, and the 370Z is by far the hardest to start off smoothly in. So if you just learned on the Z, it ain't all you that is the problem.