1 Sip water or sugarless drinks often. 2  Avoid drinks with caffeine, such as coffee, tea, and some sodas. 3  Caffeine can dry out the mouth. 4  Sip water or sugarless drinks during meals.
persuasive - intended or having the power to induce action or belief; persuasive eloquence; a most persuasive speaker; a persuasive argument. convincing - causing one to believe the truth of something; a convincing story; a convincing manner.
1 The main idea is the central concept or topic for the piece of writing. Reviewing the first and final paragraph will usually clarify the main idea.  The purpose of persuasive writing is the reason the author is writing, which is the belief or the action the author wants to convince the reader to believe or do.