Are you a very busy person so that you get difficulty to remember every activity you have to do? Maybe you will need List It. List It is a light add-on of Firefox to make notes for every activity you want to do.
Since it is an add-on of Firefox, this tool is just for those who use Firefox browser. To activate the List It, simply click the icon in the lower right corner of your Firefox or you also can press Ctrl + Shift + F on your keyboard.