It doesn’t matter how hungry you are or  how long ago its been since you last ate your favorite meal; the only way to eat food is one bite at a time. 
Even if you were invited to the “Bestest” buffet in town, you can load your plate all you want but the only way to demolish that plate is by taking one bite at a time.

Same case applies to your dream or vision. The only way to achieve or realize your dream is by approaching it one bite at a time. 

If for instance you have a dream to write a book, the only way to do it is by writing a few pages every day consistently, until you finish the book.
If your dream is to have the most stocks invested in the stock market, the best way to do this is by buying one stock at a time.
If you have a desire to attain a PHD in whatever field you are aiming at, this doesn’t happen all at once; it happens one module at a time, one exam at a time, until you get to the end of the curriculum. 
If you have rent to pay at the end of the year, start accumulating the monthly rent, one month at a time and come the end of the year, you will pay your rent sweatlessly. 

So if there is a huge task you are facing, cut it into “bite sizes” and take each bite at a time until you accomplish that task. If you do this, you will find it very easy to complete that task, but if you take it all at once, you will become overwhelmed and give up before you even start.
 

The trick is to do it little by little until you get it done; one bite at a time.