Here is Ignatius, the keen psychologist, putting his finger on a problem I know well.
We should never postpone a good work, no matter how small it may be, with the thought of later doing something greater. It is a very common temptation of the enemy to be always placing before us the perfection of things to come and bring us to make little of the present. (Emphasis added)
Resolved: I will do the good thing I can do today.