For personal commitments, use the Right Now test: When deciding whether to take something on, ask yourself, Would I do this right now? Functionally, you can think of right now as today or tomorrow. The aim is to eliminate the future time distortions observed by psychologists; by pulling the event into the present, you make a more clear, rational decision. If the answer to Would I do this right now? is no, say no. If the answer is yes, take it on.

