>>81776604Tong-len meditation is what worked for me.
I killed a guy by accident and it ate me up for a long time.
Anyways tong-len is visualizing everyone (or a specific person's) negative karma/luck/etc coming into you (as black smoke) and you transmuting it into positive karma/luck/etc (white light) and sending it back to them.
Ever seen the greenmile? Yeah that's where they got the idea from.
Anyways I don't feel regret anymore.