Chunk it down.

" The secret of getting ahead is getting started.  The secret of getting started is breaking your complex, overwhelming tasks into small manageable tasks, and then starting on the first one." - Mark Twain

"Sometimes our biggest life goals seem so overwhelming.  We rarely see them as a series of small, achievable tasks, but in reality, breaking down a large goal into smaller tasks- and accomplishing them one at a time- is exactly how any goal is reached.  So after you have decided what you really want and set measurable goals with specific deadlines, the next step is to determine all fo the individual action steps you will need to take to accomplish your goal." - Jack Canfield