First, this is the pattern I use for my paper corrections.  Sometimes there are changes, but this gives you an idea.

CONTENT                                                                     60%

FLOW (intro, body, conclusion), CHOPPINESS               20%

GRAMMAR                                                                 20%  

Short hand marks on you paper:

w       = wording is a problem

gr.      = grammar

t.s.     = tense shifting

i.s. (or I.S.) = incomplete sentence

s.s.    = sentence structure

sp      = spelling

r.w.    = repeated words

r. i.     = repeated idea

?        = I’m lost, what to you mean?

c        = contraction

p        = punctuation

rew    = reword this part

s.       = singular

pl       = plural

ct = content

Hints:

Let your paper lie on your desk for a day or two.  Then, reread and edit.

Anticipate the questions the reader might have, answer them.

Know that people reading your paper want you to inform them.

Construct your paragraphs with one word or idea in once sentence hooking up with the same word or idea in the next. 

Write assertively.  Use strong expressions.