The top three problems are:
- Clutter: It’s hard to generalize the sources of clutter. It ranges from unnecessary borders to gradient fills to too many elements on the page.
- Proximity: People underestimate how much white space they need around objects. In particular, they don’t put big enough margins around pictures.
- Text greyness: Even though my students generally do a good job of making the text large enough to be readable, they often end up with too much of it.
If there is a common element to these three problems, it’s the urge to put too much stuff on the page. Editing and cutting is a tough skill that takes a lot of practice to master.