When we first start quilting, we take every aspect of it so darned seriously. I was told to relax and enjoy the process. Excellent advice.
Cutting accurately was the most difficult thing for me to learn to do. Lots of trial and error, some seriously wonky quilts later, I have become proficient, but not superb, at cutting. My quilts are more square, which is nice. I also purchased and accuquilt Studio which has improved my cutting considerably. It was worth every penny!
People talk about squaring blocks - that is a skill I haven't been able to master. So I very rarely try to these days.
Was advised against stash, but ignored that advice. I probably shouldn't have, but I have admired fabrics since I was a kid. Now I have an excuse to buy it!