The trajectory is not a smoothly-ascending curve, but a herky-jerky spasm-fest marked by seeming dead-ends, plateaus, dark nights of the soul, intervals of boredom and stasis, not to mention bouts of terror, despair and self-doubt, which are followed, if we’re lucky, by quantum leaps to the next level.~ Steven Pressfield from, https://stevenpressfield.com/2012/07/how-we-get-better-part-two/
In other words, we advance by breakthroughs.
The key is to turn around and look back at how far you’ve progressed. Set goals, plan, and take aim by looking ahead. But when you want to assess your progress, do not look at the goal. I spent far too much time looking at my goals and invariably saying, “I surpassed the goal… I should have set a bigger goal. I could have done more.” …or saying, “I fell short of the goal. I suck.” Both of which are dangerously negative.
Instead, leave markers along your journey—you can look at your earlier writing, look at your earlier paintings, reminisce with a friend, etc. Look at the markers you’ve left along the way and think, “look how far I’ve come!”
This is the only way I’ve found to maintain a positive outlook.
Think of a goal you currently have; something you’ve been working on for a while. When was the last time you looked back to assess your progress?