How to do a ...

Abstract - In this section I tried to give some simple step-by-step recipes how to do an actual decomposition. I tried to include some tips to avoid all the errors I did and which forced me to spent some nights with my computer instead of drinking beer in a nice pub. O.k. at least I didn't go to the pub ;o). So I hope the following remarks will help you to avoid some of the errors I made and save you some time to make your own errors ;o). As for all the other parts of this treatment, especially for this part comments critics and suggestions are most welcome.