Performing a transmission fluid check is essential in keeping your transmission running at its best. 9 out of 10 transmissions go out because of overheating. Burnt or insufficient fluid can lead to problems. It's best if you check your fluid after driving a bit, then:

Pull your parking brake, step on the brake, and shift through the gears.
Put your car in park ( or neutral ) and let the engine run.
Pull out the transmission dipstick and wipe it out again.
Put the dipstick back in all the way and then pull it out again.

Then: If the engine is cool, the fluid should be at the upper part of the "cold" mark. If the engine is hot, it should be at the upper end of the "hot" mark. If fluid is too low, you need to add some.

Make sure you know what kind of fluid your car takes! Add a little fluid, wait a moment, and then start the engine. Check the fluid level again as described above

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Allow your vehicle to warm up in cold weather before putting into gear.
Always come to a complete stop when changing from reverse to drive or drive to reverse.
Avoid excessive idling in gear.
Avoid jack rabbit starts.
Avoid rocking back and forth when you are stuck in snow.
Check your transmission fluid every 40.000 kms or 2 years whichever first.
Install transmission cooler if pulling a trailer.
Pay attention to warning lights on dash.

Never ride the clutch!
Always completely push clutch pedal to the floor.
Release clutch pedal smoothly.
Never use clutch pedal as a foot rest.
Move gear shifter firmly into gear.
Do not over rev engine between gears.
Avoid jack rabbit starts.
Check levels regularly.
Never drive low on fluid.
Check clutch adjustment and operation yearly.