If you want to sound persuasive, chop away extra words to convey the full impact of your remarks. Edit needless adverbs and adjectives that muddy your message: Say "smart" rather than "incredibly smart" and "important" rather than "critically important."
Similarly, replace vague phrases with clear, concise ones. Replace "We must improve our operating efficiency by taking a very careful look at expenses" with "We must cut costs."
If an employee invests a chunk of company cash on a new technology, resist asking smart-aleck questions such as, "You spent what?" or "So you broke the budget again?" Instead, probe to learn more.