miment 9

Brain can keep at most seven items in short-term memory or four items due to recent research. Some also say that the number is actually four.

Unfinished tasks keep short-term memory full and that hinders the ability to work with short-term memory.

In order to empty your short term memory you can write the tasks. The brain doesn't know the difference between written task and finished task.

This is called the Zeigarnik effect.