Understatement is always the absolute best way to put forth earth shaking ideas.
Use words correctly, irregardless of how others use them.
Kill all exclamation points!!!
The passive voice is to be ignored.
One should NEVER generalize.
Foreign words and phrases are not apropos.
Do not be redundant; do not use more words than necessary; it's highly superfluous.
And also, never, ever use repetitive redundancies.
Parenthetical remarks (however relevant) are (usually) unnecessary.
Be more or less specific.