4.1.1 Too much underlining and highlighting
The challenge, especially when you are new to a subject, is to avoid underlining or highlighting everything. Everything seems important, so how do you know what to leave out?
If you make too many markings, you defeat your purpose; nothing stands out. The trick is to highlight or underline sparingly. See how few words you can mark and still be able to find the markings helpful. Aim to pick out key words, not whole sentences; don't worry about capturing everything. You can always go back to the original words if you need to.
Some passages of text need more marking than others. You might have a couple of heavily marked pages followed by several with very little at all. Sometimes underlining slows you down, or makes reading boring; it depends on the type of text and why you are reading it. You have to work all this out by trial and error. Experiment with different amounts of marking, then go back later and weigh up what seems to have worked best for you. Reflect on your experience.