Are you at an age where you still feel able to continue posting faster speeds (for whatever distance)?
I run everyday, but I am weird I don't time myself anymore. I have posted some real good times in 5ks, 10ks, 15ks, and 10 milers in the past but I found myself struggling when I did a half marathon 2 years ago and lost interest for awhile after that. I am back into running now but I am nowhere near the runner I used to be. My legs hurt constantly now. I have not yet ran a full marathon yet, but maybe if I get back to the form I used to be in it i'll give it a shot. In 2007 I ran in 42 road races. My best finish was in a 10k when I came in 2nd place.