First Question: http://www.sparknotes.com/lit/uncletom/themes.html
Second Question: http://www.sparknotes.com/lit/uncletom/themes.html
Is it just one answer or more than one??
When I revise, I go through my paper and highlight all the mistakes that I can, using a different color for each kind. Then after I have done that, I just go through and fix them. It helps the revision go quicker and be more manageable.