/diy/ - Do It Yourself

I have gotten back into woodworking by making custom fight sticks for people as commission work and only charge materials since I use it as a learning process. Recently someone I made a stick for really wanted to learn and asked if I could teach him. Long story short, I do a lot to hide imperfections in my work, but actually having someone watch me for every step of the job made me feel like a fraud and I want to step up my game. My greatest struggle is trying to make everything square, straight, and flat. I've been starting to watch Paul Sellers and Rob Cosman as well as read some Tage Frid and cabinet making books since I used to lurk here sometimes. Anyone got any other suggestions?