I had my own, very cynical advice all ready before I realized my attitude sucks at the moment.

Best of luck!

Congratulations on the new job.

As someone who gets to work all day on his feet I can't help but feel sorry for office workers who are forced into working sitting down. Funny how those who sit down all day behind office desks are not too tired at the end of the day to occupy subway seats on the long ride home.

I keep a daily calendar of puppies on my desk at work, 365 adorable puppies...a new one everyday :)

And use your lunchbreaks wisely...make sure you get up and leave your desk, go for a walk outside even if it's only for a few minutes. It really helps get you through the afternoon!

1.  Listen to everything; discount 95% ;-)

2.  3.  5.  Proper positioning.  Bless my high school typing teacher for she taught me, by repeatedly hitting me on the top of my head, how to sit at a desk. 

Both feet should be flat on the floor, one slightly a head of the other, keep back straight.  Your keyboard should be centred with your body and level with your arms bent at the elbows, avoid twisting at all costs (this last one is the most important and my forgetting it was how I manage to get sciatica recently, you do not want to go there)

If you can - because office furniture budgets are often low priority in some places - get a chair with arms, this will help with the sitting exhaustion and leg cramps.

To avoid 2,3,4 and 5 - move around.  Don't stay in one position for extended periods.  In an office you will probably have filing, copying, etc that will allow you to get up and move.  Take your breaks and lunch.

Another thing that is important is lighting - make sure it is adequate and you are not squinting to see.  You can adjust your computer screen to make it more visible as well.  Eye strain is a big factor in fatigue.

Oh and as you are working for a lawyer, remember they are all insane, don't take it personally ;-)

And this brings us back to #1 Office Rule - maintain a healthy sense of humour and you will be fine.

I thought I saw light at the end of the tunnel but it was just my boss with more work - and a torch.
     Squidoo.com

A hint that I heard once - every hour or so, leave your desk and take a walk around - run upstairs (if your office is on two floors), stretch your legs, focus your eyes on the end of the corridor, or better yet pause to look out the window.  You will be feel better, and you will also be more productive.   And if you think people might wonder about you wandering about, carry a file with you.  Let them think that you are going to consult with someone about something important.   

Posture is everything :-)

Here are some tricks that work very well for those leg cramps and fatigue and do not require any specialized equipment ...

Sitting at your desk, extend one leg outward (hopefully you have enough room under the desk) and make small circles with your foot, rotating clockwise at your ankle, do for a count of five, switch to the opposite leg.

Standing at the photocopier, lift up on your toes, count to five, down, repeat for a count of five, then reverse - go back on heel toes in air.  (you can also do that exercise sitting down).  Don't try this in high heels, frankly don't wear high heels in the office.

If you are feeling tired, breath deep through your nose, hold, exhale through your mouth - repeat three to five times.

btw, those exercises work great on airplanes too.

Accomplishing the impossible means only that the boss will add it to your regular duties.
     Doug Larson

Atta girl!  I knew you could do it.

New jobs are steep learning curves, but the payoff is great. Learning  new skills, meeting new people and yes the money!