I'm running the Silverton Alpine 50K in July for my first ultra (ridiculous choice, I know). But after that, I'm going to focus on running a faster 10K.
I just never focus enough on one type of event to get faster......I like the 10K distance, but I also love trail running, trying out new distances, pacing for friends, etc.
But my main goals for the year are A) Finish the Silverton 50K and B) Run a 43:XX at the BCS Oktoberfest which is about a minute faster than what I ran this year.
Consistency: It's only a virtue if you're not a screw-up.