We usually make effort unsustainable. For example:

• We work out like crazy for a few days (usually at the beginning of the year) and never go back to the gym.
• We try to meditate for 30 mins one day and don’t give it another shot until 10 days later

But when it comes to developing and maintaining a new habit, frequency matters more than intensity.

When something becomes effortless, raise the level of intensity, to the point where you can get there without too much resistance, but it’s still somewhat challenging. To put it more concisely, bend but don’t break.