On a calendar (either paper or digital) fill in the basic structure of your year. De sure to include your work and or school schedule, any travel or vacation plans,etc. Major competitive events you will attend, as well as the many events you MIGHT attend need to be filled in next. Quickly a very solid and obvious structure will begin to emerge that should be very easy to expand on.
The sport you are training for as well as your personal/professional philosophy will determine the details of the finer structure of your year plan.
Here are just a few tips for helping to develop functional multi-year programming no matter what sport you are training for.