In an effort to take Confession more seriously, I did some research and found a few examinations of conscience that can help boost our sincerity.
I really like this one from Yellow Pelican created specifically for husbands and wives.
Here’s a very brief beginner’s one from USCCB, based on the Ten Commandments.
Here’s one from Loyola Press based on love of God and love of neighbor.
This last one from Fatima.org has a great, in-depth discussion on the process of Confession and preparation for it, and a comprehensive (kinda long, and sort of checklist-like… but idk, you might like it!) examination of conscience.