our life has dramatically changed for the best since we stopped telling DD not to do stuff, but got her to do other stuff instead
ie we need the table to eat dinner, so she has to move her colouring pens/books etc
she doesn't enjoy sitting around the table with others to eat, she hates the smell of food, she hates to look at it, she doesn't want to sit and chat, she eats because she has to, doesn't see food as pleasurable at all.
at home i make her food separately to mine and DHs, and if we eat out or we have guests and she manages to sit with us and eat at least some food, her 'reward' is being allowed to put her tablet/cd player/my phone on and play games/listen to music while we finish.
DD really struggles with supermarkets, she will use every distraction technique going so we don't take her (is 'ill', hides, has to watch cartoon etc) so i don't take her to do big shops, use online mainly. BUT if we have to go, and she manages to walk round without poking/kicking stuff on shelves, or moaning she gets a packet of moshi stickers as a reward.
she also hates baths, how our neighbours haven't called the police at the noise is beyond me
but i've discovered magic beans that dissolve in warm water and funny/animal sponge shape is inside - you can't have these unless you sit in the bath water for at least 5mins...
i'm not saying these exact things will work for you, but wanted to share how i've had to change my thinking what constitutes a reward to DD. me 'happiness as a parent' doesn't register with her, it has no concept. ASD is a very 'commodity-driven' condition IMO.