Hello
My DS is autistic with a very demand avoidant profile.
Have you read The Explosive Child? We found the strategies in this to be very helpful.
Plus, all the usual suggested things like using humour, making it a game, not directly saying no or making a demand. Leaving plenty of time so I don't get stressed if rushed.
Letting him choose when he does things (like - we're going to do x today, but you can choose when you do it). Too much choice is not good tho - he can't cope with that.
Incentives don't work that well, but distractions do (audiobooks have been a life saver for car journeys for example).
Avoiding busy crowded places - DS like to run free in nature.
Internet shopping!
Knowing when to say no to stuff that I just know he won't cope with (even when I feel I will be missing out, eg spending time with a big group of friends. He can only cope with 1/2 children at a time, and even then he needs a place he can go to escape to).
In some ways life has got easier as DS has got older (altho different things have cropped up). He's due to start special school in September (altho he's not behind academically he's so so demand avoidant at school he really needs the expertise of staff who know how to work with PDA children, plus small class sizes and access to extra curricular / enriching activities that just he can't access in mainstream school, even with full time 1:1).
This probably isn't that useful to you - maybe if you give an example of the kind of things you would like some ideas for?
But you are definitely not alone. There are some good PDA groups on Facebook.
I won't lie - some days I have endless patience and those days are easier. Some days tho I don't / I get it wrong and those days can be tough.
DS is ultra controlling over my younger DD too which can be hard during the holidays (it's fine when she feels compliant to go along with him, but not unfairly she doesn't always want to!)
Actually - one thing that helps us is I still do lot of stuff for DS - like put his clothes on, shoes, clean his teeth. He can do it all by himself but if I ask him to he'll refuse (we had a stand off over teeth recently when he wouldn't brush them but then collapsed wailing that he was terrified that his teeth would rot. It lasted a long time. He basically boxed himself into a corner with his own demand avoidance!).
That was a lot longer than I meant it to be!