I've been running pretty regularly for the last 6 months now. I'm working on distance, speed and endurance. It is very exciting to notice myself improving with each passing week!
When I first got back into running, I was happy if I ran 3 or 4 miles. Now the distance for a "normal run" is 8 miles! Longer distances are definitely becoming more do-able for me.
My speed is also improving. I shaved 3 minutes off of my 8 mile run today! (ran it in 65 minutes) My "normal pace" is right around 8:20 min miles. It is fun to feel myself getting faster.
Endurance is a biggie for me- and I believe that it is totally a mind game. Up until a few weeks ago I had to stop every 2 miles or so to take a drink of water, walk, or just to mentally gear up for the next 2 miles. It took me a long time to get over the mental block and keep running after 2, 3, 4 and now 8 miles! It is very empowering to know that I can now run a full 8 miles without stopping.
My next big hurdle is another long run- this time 18 miles. (to prepare for my May 27th marathon) I think the hardest part about this run will be finding the time to do it! :)