s.a. http://forum.xda-developers.com/showthread.php?t=2011811
Ubuntu Tricks - how to generate a list of installed packages and use it to reinstall packages
Back In Time is a simple backup tool for Linux inspired from “flyback project†and “TimeVaultâ€. The backup is done by taking snapshots of a specified set of directories.
Backup and Migrate simplifies the task of backing up and restoring your Drupal database or migrating data from one Drupal site to another. It supports gzip, bzip and zip compression as well as automatic scheduled backups.
Explains a backup-strategy using rsync and hard-links. My choice to go. (use --link-dest!)
Some of the apps that come with your phone can be safely removed without causing stability issues. They take up space and use resources that could be used for other things. Removing unwanted apps will theoretically make your phone run faster and smoother, plus, you can configure your phone just the way you want it.