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
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