Impressions - don't create samskara
As Babuji Maharaj said, "Good samskara will bring you back, perhaps as a king, perhaps as a multimillionaire. What you call bad samskara may bring you here as a leper, a beggar, a diseased person, but both bring you back here - only the conditions change. So, don't create samskara. How not to create samskara? Remain in Constant Remembrance. When you are in Constant Remembrance, you do things without creating impressions; therefore they have no effect upon you.
Taken from the book "Heart to Heart, Vol. 5", Chapter "Cleaning is Most Important", pg. 139, by Revered Chariji