Tenses...
I have written, I wrote, I write, I am going to write, I will write later, I am writing...
Okay so I've put half a chapter completely in past tense. (Believe me that's an achievement to get it right.) But do people prefer past tense or present tense? With present tense you end up with too many 'occasnioally' and 'practically' words which get annoying after a while.
Especially in action it is better to have it in present tense, but I have that bit in past tense. I think we discussed this in class before. Where you don't change tense mid chapter, but you can for each different chapter. Blah, I really don't know. At the moment I'll keep it in past tense, but I keep on changing it without thinking. Not good.