for me the things we must consider are these:
-accept that you are a sinner (sometimes we say we do but those might be in words only)
-don't use the word SIN (it sounds like a final judgement) anymore, rather use the word MISTAKE (can be changed or manipulated for better purposes)
-forgive yourself and others (forgiving is for the sake and health of the one who forgives because it releases tension etc.)
-acknowledge your part in every unlikeable events
-break the blame cycle
-feel free and don't be too conscious about yourself making mistakes (it's okay to have mistakes_it is essential to growth)
-don't feel much guilt

that's what I can tell you and if you have vices, better get busy with something (gardening, painting/ drawing, etc.)

oh so powerful