If you consider reading Will smith's autobiography WILL, I strongly recommend you listen to the audio version on Audible, read by the author himself, it's absolutely captivating.

The book starts off with a powerful life lesson that he learned from his father at age 11, that would become the foundation of how he would lead his life. It all started when his father Daddio assigned him and his younger brother to build a wall on the front of his shop. For a whole year, day in a day out, rain or shine, school day or weekend, the two boys had to work on the wall. They weren't happy about it and didn't understand why they had to do it, but their father wasn't the kind of man you could talk back to.

One day, after hearing them complain, about how ridiculous the task was, Daddio snapps and yells:

Stop thinking about the damn wall! There is no wall. There are only bricks. Your job is to lay this brick perfectly, then move on to the next brick. Then lay that brick perfectly. Then the next one. Don't be worrying about no wall. Your only concern is one brick.

Later in the chapter, Will smith writes: 

Some of the most impactful lessons I've ever received, I've had to learn in spite of myself. I resisted them, I denied them, but ultimately the weight of their truth became unavoidable. My father's brick wall was one of those lessons.

(...)

When I focused on the wall, the job felt impossible, never-ending. But when I focused on one brick, everything got easy. I knew I could lay one damn brick wall.

(...)

I started to see that the difference between a task that feels impossible and a task that feels doable is merely a matter of perspective. Are you paying attention to the wall, or are you paying attention to the brick?

(...)

The secret to my success is as boring as it is unsurprising. You show up, and you lay another brick. Pissed off? Lay another brick. Bad opening weekend? Lay another brick. Album sales dropping? Get up and lay another brick. Marriage failing? Lay another brick.

(...)

No matter what you're going through, there is always another brick sitting right there in front of you, waiting to be laid. The only question is: are you going to get up and lay it?

Will Smith's wall story made me think about a similar analogy that I previously heard from Mel Robbins in her audiobook Take control of your life. She says we should view our goals as a Lego set: when we look at the end result (the castle that we're supposed to build), it seems scary and intimidating, and we might end up not event starting because we feel discouraged by the task at hand. But if we take it brick by brick by brick, eventually we'll end up building the entire castle.

As an entrepreneur, I've often found myself overwhelmed by my own ambitions, to a point where I just ended up giving up before I even started. This is a pattern I repeated over and over again for a long time, and even now I still have to fight it.  I had to learn how to take things step by step (or brick by brick). This means constantly thinking about the next move, while keeping the eyes on the prize, the end goal, the vision.