The nudge gets you going leading to a rhythm before eventually creating the momentum. Getting to momentum is hard; however, staying in momentum is easier.
When you create momentum there is an influx of energy, creativity, and focus. In this state, a lot can be achieved.
However if you let up and let the momentum stop, it takes a huge amount of energy to rekindle the fire.
When you have momentum, you want to fully capitalize and optimize. The way to do this is to proceed with full gusto and energy completing what you have set out to do before the zest dissipates.
The trampoline effect of momentum can be amazing and leapfrog you to a totally new level.
You may experience some anxiety and doubt about your approach. However, crush that immediately before it crushes you as a small doubt in such a situation is too big!