I found what works with the getting dressed 'no' is to give an option. 'which top do you want to wear - this pretty butterfly top or the sparkly star top' she then picks one. Then do the same for the pants, socks etc etc. Takes a while but gets it done in the end with out tantrums from either of us

Perhaps with the cleaning up the toys you could make it a race game. I normally say 'Pack it away, quickly quickly' and bend down to help her. Also pointing out items like 'can u pickup the cow for me and put it in the box' and over praise when done.

HTH
We do the same thing pretty much.

I have found not being able to give DD the option to say no has helped. Which means I need to think more about how Im asking her to do something. So for instance if i say to DD "eat your dinner".. pretty much garanteed she is going to say no. But if I say "how about you just have 3 more spoon fulls for mummy?" then she finds its more interesting and eats her 3 mouth fulls. These kids are funny little buggers lol.