One of my favorite “zero effort” spells is a mirror spell.
I carry a compact with me (mirrored on both sides) and whenever something happens that I need to reflect on or someone does something that I think THEY need to reflect on, I write my name (or the other persons name) on one side of scrap paper and a brief synopsis of what needs to be reflected on on the other side and I close it in the compact.
Then I just leave it closed up until I think it’s been long enough.“Go sit in the corner and think about what you’ve done.” YES THIS IS BRILLIANT.