I haven't got a diagnosis yet, but I've started the long, ridiculously slow process and it's pretty bloody obvious that it's what I have.
The biggest thing for me has been cutting out gluten. My fibro fog had been getting progressively worse and got to a point of being almost constant. I cut out gluten a month ago (I think? maybe three weeks) and the constant fog disappeared immediately. Now it's back to what it was a couple of years ago, later in the day, when I'm tired. But doing that has made my joint pain worse, which I'm not sure is coincidental or not but a friend who gave up gluten (due to IBS in her case) told me her joints are slightly painful now weirdly enough.
Setting small, achievable tasks and goals for each day rather than massive ones.
I have a couple of games that know I can get sucked into and when I'm in more pain than usual I play those as a distraction. I am lucky as my pain generally isn't too bad, it is just constant, and I can go without painkillers most of the time. I don't like using them as I got to a point in my teen years where I was having ibuprofen, paracetamol and codeine constantly due to knee pain, which was the only joint pain I really suffered from until I was 18/19 I think.
I check the weather and atmospheric pressure every day for the following day as that effects my joints and head symptoms.
My head symptoms are what get me the most. I talk too fast for my mind to catch up and struggle to speak coherently when I'm tired. That and if I go climbing to a big centre on a Sunday I'm whacked out for the week; 7 climbs on the 6 metre wall at my local centre seems to be my limit, but that's not very high or exciting :(
You need somebody who you can complain too and who is sympathetic. I try not to complain to people as a lot of people don't understand it. DP gets the brunt of my frustration and he copes really well with picking up the slack. He does most of the cooking, most of the housework and looks after me because working tends to whack me out (I only work 28 hours a week). He also calms me down when I get pissed off at myself because I can't ride a bike due to my problems, or go paddling any more, or knit very often or do my coursework or go do my scouting. I rely on him a lot more than I like to admit, especially because I don't really have any friends and I struggle to find time to go see people I want to because of feeling so shit when I finish work.