This is pretty much a copy and paste from what I've said before about paddle shifting:
I'm not sure if I can properly describe how to the use paddles
properly, but for example, this is a tip for how
I like to use them. In this case, I'll briefly talk about how to use them for straight acceleration from a stop.
1. While stopped, move the gear selector in DS mode.
2. Downshift (-) using the gear selector or paddle shifter. In the cluster display, you should see a "1" signifying that you're in 1st gear.
3. Step on the gas and get moving! You'll start to rev up extremely quickly so at this point, pay attention to your RPM (see Note below).
4. Once your RPM hits around 3500-4000, quickly upshift (+) to 2nd. Your RPM will still continue to stay high and speed up.
5. Now, quickly upshift again to 3rd at around 4500-5000 again. You should be at around 50mph at this point.
6. At this point if you're cruising and at a steady speed, start upshifting gear by gear (probably one gear every other second) until you get to 6th or 7th gear.
7. Remember, while in DS mode and you've activated the paddles/manual shift, when you come to a stop, the car will revert back and stay in 1st gear until you manual shift it again or until the computer takes control and upshifts for you (I recommend not letting the latter happen).
8. It might take a while to get the timing down to a comfortable level. My advice is, unless you're trying to hit redline and possibly screw up your car, try to never let the RPMs go past 5500-6000 and once you're cruising along on flat road at a constant speed, make sure to shift up to 7th gear.
Once you start messing around with the paddles in a straight line, you should eventually be able to know how to use them in turns and curvy roads.
Personally when I'm on a curvy road with uphills, I tend to stay shifting in between 3rd, 4th, or 5th. These are great gear sections for curves, especially going down to 3rd when you want to tackle steep uphills and quick accelerations out of turns.
Note: Also, of course, if you want to really have some fun, before #3, you can also turn your traction control off, turn off your A/C, and unplug anything from your power outlet. Put your left foot on the brake and your right foot on the gas. Again, with the left foot on the brake, rev up on the gas to around 4,000 rpm and gradually let off the brakes for a very interesting launch!

I recommend only doing this when you're pretty clear on the road, btw!! (Just in case there's a little bit of spinning.

)