Well, you've chosen a good subject....
Practice is good for a start, I use birds, obviously not intending to take great photos of them as far as they bridy types are concerned, but it helps when following an aircraft being chucked about the skies.
In terms of the technical bits, you'll hear people say that you should use Shutter priority, and higher ISO's. You can do that, but there are alternatives. I almost never use anything other than 100 ISO.
Also I use Aperture priority for jets, setting say, F5.6 or 7 on a sunny day will get you a good shutter speed. The down side of using shutter priority is that you'll find if the weathers anything but great, you can get the camera not being able to set an aperture that matches the speed, hence resulting in you having to up the ISO and getting noise.
For anything that spins, props and choppers, I am a bit knackered at the moment, I have an old 300mm F2.8 lens, no IS, so the lowest shutter speed I can go too is 200, but it's a risky option. However, you'll need to be at that speed or lower for a 'spinning disk'. Thats the only time I use shutter priority.
Most meters can deal with exposure just fine. Unless the plane's between you and the sun, in which case,. some exp comp is in order, but the amount depends on the sun and exactly where it is.
The only other advice I think I can give is look at flickr or other similar sites for other peoples efforts, and copy the ideas, if you like them.