There have been many a times when I forgotten to carry out tasks I was supposed to do just because I plain forgot them. I do write them down but sometimes those notes get neglected too. Tasks as simple as calling someone on a specific day or your doctors appointment can be forgotten quite easily. To overcome this I use a simple method so that I can get a SMS message a couple of hours before I am supposed to do something. You do not require to pay anything except if your cell phone provider charges you for incoming SMS messages.