If you've already asked yourself this question, you're a step ahead of most other people.
I'd say it's okay to start planning now for the next year. These goals to accomplish don't have to be written in stone, but it's a good idea to start brainstorming some ideas. There are about seven areas in your life where, in order to have a more fullfilling life, these accomplishments should be under. They are:
Start brainstorming ideas on what you'd like to accomplish. Even if you feel it's a huge goal that you'll never be able to finish, write it down anyway. When you get closer to the next year, choose which goals you'd like to accomplish.
And don't be afraid to think big. Because it's the big things that make a difference in this world.