I have a problem from preventing me taking the reward when I fail to do my short therm tasks, but only when it is a small reward. It is just too attractive not to take the reward when it is small. For example eating a piece of a cake which I bought few hours before.
Should I choose the reward before starting the task or just before finishing it?
Hmmm for smaller goals I would choose the reward after, as these tasks should be easier to complete. A big goal I would choose the reward maybe before to give you the extra motivation.