Used to be overworked all the time. I find the best way to avoid this are two things:

1. Plan your hours in advance and stop abruptly once time is up. The added bonus is that you get a hard deadline to aim for each day, which stops you from procrastinating. This does not mean you work less, hours. It just means that you plan out those hours, so that you can plan your life.

2. Do not over-commit to doing stuff. ( Over-deliver instead ).

Note: Had a huge "crunch" situation a while back. Made an expirement, where I planned the crunch with my team. Each day, we decided in advance how many hours we needed to work tomorrow. This allowed team members to plan out their long days. This is really critical if you have children. It worked great, considering that we were working very long days, the tension really went down.

Physically, there are two more things I recommend:

1. Drink a lot of water. I program with a one liter beer glass next to me.

2. Every 3 hours I get up, and physically walk out of the building to a predermined spot 500 meters away. It takes me no more 10 minutes, and I do it no matter the weather. Besides solving your posture problems, it gives you time to think. Do not do this with other people. Do not talk on the phone while you do this.

I have more long time tiredness than the one you described,

seem that I even do know now what is a reason to it - when you

do programing you hold your mind in concentration state (and

this is something like your mind is closed), when I do it five years day by day I did much work but I do not manage acheive a deeper state of relaxation of my head (i was going swimming, riding bike, listening to music etc but it was all shallow relaxation, forgetting more about it all (two months) seem to start helping me, but still i feel only the moments when it (the tension) breaks,

like yesterday, today it got me again - this is maybe more complicated, i think some life troubles can catch a brain even more than programming, but programming too - I got general problem to set my mind at ease into relaxed state (seem like I just cant do it ),

Probably I will take yet about month (maybe less) of a lounge, and will do only some soft work - seem I still need it - then I will see.

Our company has just past it's 'crunch' period where I was working on average: 10am to 12am for about three weeks, 5 days a week.

Apart from that it's usually the standard 8hr day unless we need to meet internal deadlines.

I'm overworked a lot and I only work 4 hours a day. I'm a web developer.

Things that stress me out:

browser/device compatiblity issues (!) Every vendor wants to do things different. f**k them all!!

broken, badly/wrong documented sh*t frameworks/libraries

stupid customers who have stupid requirements and who are too stupid to follow the simplest instructions

PHP

... probably more

seem that my kind of 'overworkness' is somewhat uncommon -

I am working at home now mostly and for myself - i worked on my own no deadlines or something but also I developed a long time tiredness (that came from overconcentrating my mind) - to the degree that i began to get really sick of that - now after some over 2 months of rest it still gets better so it helped (soon probably I will get back to work, hope the energy will let me do some amount of fresh working )

I feel rather overworked. I spend 5 hours per day working, 1-2 hours driving, 3-4 hours in class, and 4-10 hours doing homework. I work seven days per week, but I'm thankful that I only have class for five. It isn't my job that stresses me, really; I'm mostly a web developer (I am programmer with a degree, but I need to pay the bills somehow where I live), and I work shorter hours due to class. However, the combination of everything takes a heavy toll on me. I often get up at 0700 for work, then go to work, then class, then work again until 1700, then sometimes I'm up until 0300 doing homework. A lot of the time spent on homework is being too stressed out to do my work, and being unable to act, so it takes me until really early in the morning to get it all done.

For me, the point of over-exertion is having no time to adequately recover. I'm most stressed out about the massive workload, and never having time to even watch a television show.

(On a side note, transferring between universities is rough. A lot of my core classes transferred as electives, so now, with almost all of my electives filled, I'm taking almost all core classes for my remaining semesters, which can be viewed as a form of suicide by some. This explains the high homework load and why it takes so long to complete it.)