Momentum is nearly always taken to mean the concept of momentum in physics.
It also has a more general meaning in common speech: It is "strength or force gained by motion or by a series of events",[1] as in:
It can also have a meaning relating to one's personal life. Mason Currey writes in his book "Daily Rituals"[2] about
There's something about starting and continuing a project: the mental energy you get when you keep going. It sustains you. Every bit of work you do provides feedback that makes you want to do some more.
Getting an early start can help. Also, beginning at the same time every day.