Having a plan & an overview will help you stay on track
Obtaining something which you really want will not come to you immediately, it will take some time rather than when you will want it to come.
For example, people wanted Rome to be built within a week but it took much longer than that.
Especially when wanting something important to be gained, it takes effort and consistency.
It may not come immediately but it does need a good view of what you are planning to achieve.
Having the bigger picture in your head will help you reach your goals in much less time in the long run.