Hard at first, easy later

Doing something consumes energy. As a result, you have less energy to do the thing again in the short term, which makes it harder to do.

However, doing something also builds that thing into a habit. This means that it takes less energy to do the thing in the long term, which makes it easier to do.

So you need to do things that are hard at first in order for them to become easy later.

Also published on Medium.