For Mario Kart Wii, using a Wii Remote, press b and 2 while steering. This will allow you to drift. You should get a little faster every time you drift, and you can do this in 50cc, 100cc, and 150cc.
You'll need to collect all of the underwater "Sparklies" (they are pieces of a launch star), and then take that launch star. It is very simple from there. Remember not...
The rule of thumb is to triple your inbound wind correction. For example, if you need 4 degrees wind correction to hold a course inbound, fly a 12 degree correction...