What areas of my life am I short-changing?

This question strikes a cord with me because I feel like I (like most others in my age range) overextend myself. Even more than that, others expect that we overextend ourselves. There are things that I let go of simply because I don't have the energy to do them. My apartment, that I've sat in for most of the day today, is a disaster. It did not become this way without my knowing, I have just put it off because there are more pressing matters in my life. I'll get to it eventually (before Monday because staff training begins and people will be coming here). I also have tons of half-read books because I move on to new ones when I become bored.

I sacrifice "me time" every week day.
I neglect homework on a regular basis.
I have week old dishes in the sink.

I let things go. Period. In these busy times of constantly juggling, it feels impossible to keep all of the balls in the air.

The thing that I most dislike short-changing are my friendships that are not "tangible" (read those with people not in a 20-minute circumference of myself). I feel guilty every time I see a missed call from one of my friends and even family members that I don't see often. Unfortunately, I just don't always make the time. I need to stop making excuses, be there, be present for everyone that's important.

I'd also like to think that I'm not alone in this. A question to everyone (myself included):

When do you realize your mistake and give back the change?