"When I took office, only high energy physicists had ever heard of what is called the World Wide Web...now even my cat has its own page."- President Bill Clinton
Look at the Internet. You can't! You don't have enough time in your lifetime to see all the pages. And at the rate that new sites are available, you couldn't even keep up with the new ones. You would be hard pressed to keep up with new blog pages on Blogger!
As huge as the Internet is, it was built one page at a time. Bill Clinton or Al Gore just didn't invent the whole thing in one day, using the entire White House staff to make pages all night and then say "Here it is!!" They must have spent an entire three day weekend! But the point is they only could invent it one page at a time.
Likewise, you're goals- if they are grand and inspiring, if they are challenging, don't happen over night. They are built over time, by a series of events. Events that form mile markers along the way. Identify those mile markers.
If your goal is to Climb Mt Everest, are there things in between that must be accomplished? Purchase of gear, training, smaller practice mountains, bake sales to finance your trip? You know where you want to go, you should have increased your "understanding" of what it takes to get there; now, just specifically identify steps on your way. When you accomplish those steps, celebrate them.
By doing this you will not only prepare yourself to succeed at your primary goal, but you will build momentum along the way.