1. Factoring is a major part of what I do. Most of the messes I create are because I did too little factoring, not enough.

2. Having large numbers of programmers working in exactly the same environment. It means there are no limits to the way we can work together. Apple II, IBM PC, Mac all developed grooves like this.

3. Too many frameworks. I wish more people worked in "straight" JavaScript. I would be able to understand more code.

4.