Well, I can't say that I've ever broken an arm, so I can't help there. However, if you're expecting to want to minimize use of one hand for a long time (like, I dunno, >2 months?), and you like learning [certain kinds of] new things for the heck of it, you could check out the Dvorak one-handed keyboard layouts.
 

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Thanks, but to be honest, I'm not really the kind of person who enjoys learning that kind of thing. By the time I had my head around it, my arm would probably have healed anyway.

I can type okay as long as I can rest my broken arm on a table at the right height; if I didn't have a toddler to care for, I wouldn't be very inconvenienced. It's just all those two-handed jobs, like picking him up, changing his clothes and nappies, putting him down in his cot, putting him in his pushchair ... all stuff I can't do without hurting myself, and possibly dropping him into the bargain.
 

My experience of doctors is that they get annoyed or confused when one doesn't have a bog-standard set of symptoms. (Part of this is from the time pressure on them to deal with as many patients as possible.) Good luck!
 

The doctor was perfectly nice in this case, I'm glad to say. He just told me to come back next week.
 

Well, in my youth I once altered a denim jacket within a few square inches of being completely unrecognizable. I still have it, and it is possible, after close examination, to determine that it was not entirely sewn together from patches featuring various punk and heavy metal bands. Does that count?
 

I totally confused my doctor by taking my medication EXACTLY the way I should. Apparently the standard dosage is predicated on the presumption that people will not take it properly.

So, reduce the dosage, more blood tests. Rinse and repeat.
 

If your sling is causing you pain, you might see if you can adjust the fit. Small changes in the length of the straps can make a big difference.

Another helpful thing is, when you're sitting down, to have a pillow on your lap to support the weight of your arm in the sling, rather than relying just on the sling to hold your arm. It gives your shoulders a break.

It might also help to see if you can get some occupational therapy. There may be tricks and tools for doing necessary tasks that are known, but which you haven't had a chance to learn. An OT might also know exercises to strengthen your skills with your other arm, so you can enjoy more independence.