66-Tage-Zeitmanagement-Challenge (E-Book)E-book66-Tage-Zeitmanagement-Challenge (E-Book)
An e-book challenge to build better time and self-management habits over 66 days, the time it typically takes for a new habit to stick. In German. Details
Selbstwert & Selbstbewusstsein stärken – OnlinekursOnline courseRelationship psychologist Wieland Stolzenburg's online course on self-worth, self-love and self-confidence, with practical psychological exercises for everyday life and relationships. In German.
Updated: October 2026
Once a week: new picks, bestsellers and seasonal ideas. Free, unsubscribe any time.