If you always wanted to help out developing Ubuntu we have a great set of recipes to get you started: https://wiki.ubuntu.com/MOTU/Recipes
The MOTU Recipes contain series of simple steps that will give you a feeling of the development tools you use as a developer every day and will show explain a few concepts that are worth knowing. We had really good feedback on the recipes, so be sure to check them out.
If you have worked on Ubuntu for quite a while already and want to report about things you do regularly, please don’t hesitate and share them at https://wiki.ubuntu.com/MOTU/Recipes - even if it’s just an initial draft, the MOTU team will help you out to get it right.
Enjoy the cooking… :-)