Visual note taking
Most people I know use a piece of paper or a word document to take quick notes on things to be done in a web project. For me nothing is more to the point than handwritten notes on a screenshot of your app.
When you keep your notes on a text file, you will eventually have to get back to your application to remember what “background of sidebar on tasks overview page” actually refers to. When you take your notes on a screenshot, the word “grey” right above the sidebar does the trick. Visual note taking saves you from the annoying back and forth between your notes and your application. It’s like a post it with the text “buy milk” on your fridge.