The two-minute rule 

2-minute rule = is a concept from David Allen's workflow management method called Getting Things Done (GTD).

2 minute tasks:

• If you face a task that can be completed in two minutes or less, you should do it immediately rather than postponing it or adding it to your to-do list

 

The 2-minute law 

For bigger tasks:

• The thinking here is that when you want to start something new and build a good habit to sustain it, it's helpful to break the task down into tiny bits you can do in two minutes each.