The happiness you get from a simple strike. Do you write down the things you need to get done, stuff you might forget, things you should do? I have one such list; I mark the important dates on my table-top calendar, in my diary, as well as in the notes in my computer. I made it a habit to look at my 'To-do' list every day, keep adding to it until it gets longer and then strike them down or delete them once the thing is do...