If you want to communicate, use the telephone
You owe reality nothing and the truth about your feelings everything.
Don't write love poems when you're in love. Write them when you're not in love.
To write a poem you must have a streak of arrogance-- not in real life I hope. In real life try to be nice. It will save you a hell of a lot of trouble and give you more time to write.
Think small.... If you can't think small, try philosophy or social criticism.
Never write a poem about anything that ought to have a poem written about it.