Neue Gewohnheit in 21 Tagen? Was Studien wirklich zeigen
Do new habits take 21 days? Studies point to about two months, with wide variation. What actually helps, and how to try it this week.
Gewohnheitsbildung
Do new habits take 21 days? Studies point to about two months, with wide variation. What actually helps, and how to try it this week.
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