Tips for French Translation!Watch
Also look out for translating directly from English to French. What I mean is, in French, a sentence can be structured in a different way to English. For example, if you wanted to say 'my best friend doesn't judge me', you would say 'mon/ma meilleur(e) ami(e) ne me juge pas'. Notice that in French, the reference to yourself is INSIDE the negative (ne... pas), before the verb (in this case 'juger' - to judge). This is different from English, where we put the self reference at the end of the sentence.
This is all I could think of for now, hope this helps!
EDIT: I just found a whole site basically dedicated to false friends here: http://french.about.com/od/vocabulary/a/fauxamis-a.htm which gives you a huge range of words to look out for.