At the moment the majority of editing is making sure I don't flick from past tense to present tense and back again - sometimes within one sentence! And taking out extra words (eg that) that I love to put in. :)
When I change the tense, I often have to re-write sentences. It makes me laugh that I can't just change the wrong words, but I have to change other words because they sound silly there when it's changed to present tense. Strange how my brain works.
Anyway... shouldn't be long now before I send my novella to my critique group for their last comments. Then I can hold my breath while I find a publisher to submit it to... or two or three or four. Maybe I shouldn't hold my breath!!