It can be practical to take notes on a piece of paper for simple daily tasks. However, it can be problematic to write down an important note that will be reminded after a long time on a piece of paper. How will you remember that note if this piece of paper is lost or damaged?
Note applications on computers and smartphones are very useful for keeping your important notes securely.
You can add important notes to remember to your desktop with Rainmeter notes skins. You can set these notes to appear constantly if you wish.