I had done a lot of DIY, repairs and carpentry projects before I got the woodworking bug, so my first projects came off OK, and what didn't was easily fixed or hidden. So I don't produce much scrap. Learning to make picture frames, however, was an expensive trial and error process because cutting precise miter corners took a lot of experimentation until I worked out the technique and added a specialized tool for that purpose. I was in my peak earning years when I outfitted my shop, so I have some very good and accurate tools. That and a Wixey digital angle gauge let me produce some very nice cabinets and stuff on the first try. That and I also think through projects for awhile before starting so I have a clear mental picture in my mind before I start.