Don't write that he has a brilliant future before him. Futures do not lie in the past.
Don't say present incumbent. Incumbent means at present in office.
Don't say old adage. If it's an adage, it's old.
Don't write widow woman, true facts, old veterans, the la grippe, the hoi polloi.
Don't say possibly may or possibly might. The verb conveys the idea of possibility.
Two words may be discarded generally in the phrase whether or not. Write it: He doesn't know whether he will go.
Omit the italicized phrase in He was thrown a distance of 50 feet.
Don't write regular monthly meeting. If it's monthly, it's regular.
If a man is well known, it is not necessary to say so.
Omit the adverb in the phrase totally destroyed.