2. Post in the right forum. You're more likely to get help if you do, since otherwise the experts in that subject won't see it. Don't post in Abstract Algebra unless your problem relates to groups, rings, fields, and the like; this is not the same as High School Algebra. Don't post complicated real-world problems in Complex Analysis (which is the study of analytic and meromorphic functions); that's what Applied Math is for.

3. Make sure the problem you type out is the problem you are given. Any kind of typo can cause people to solve the wrong problem. Include all relevant information -- usually it's best to type the problem exactly as it's given.

4. Pose your problem with as few ambiguities as possible. For example, if there can be any doubt what an exponent, radicand or argument for a trigonometric function is, enclose these in parentheses. You may know what you mean, but others may not.

5. If you're writing formulas, take a small amount of time to learn to use LaTeX. This increases readability of complicated expressions dramatically! You may find this equation editor useful.

6. Use descriptive titles. Typing as much of the question as will fit in the subject heading is not desirable. "I need URGENT HELP thanku" is less desirable. Good titles get the most attention.

(with apologies to The Chaz, from whom I stole this post, and Dale Carnegie, from whom I stole this title)