Hi jeanweasley and tcstudent,
For LA, if you can identify those problems you're having, it's time to address them. Be harsh on yourself. When you proofread your writing, catch yourself making those mistakes and cross them out. Remember to keep it lean in LA - you need 1) what the writer/speaker intends to do; and 2) how the reader/audience reacts. Repeat those two ingredients 4 to 5 time per paragraph and you have a body paragraph. Obviously, there are many things to add on to make your essay an A/A+ standard, but don't lose sight of those two simple things.
For text responses, watch out for the following:
1) Retelling the story - NEVER do it.
2) Writing in the passive voice too much - avoid!
3) Writing without a clear plan of how you want your essay to turn out (don't take chances).
Obviously there are many elements in a great text response; too many to post in a forum. I cover them in my classes (
http://www.aimandachieve.com.au).
All the best to you both,
Yang
P.S. Jean - if you are interested in philanthropy and business/strategy, think about joining SIFE Monash (if you end up at Monash). I managed a project in SIFE for The Big Issue, and the project was funded by the government.