Avoid non-descriptive/non-helpul titles
Bad Example: Help me! $$$$ This is bad because it doesn't specify what specifically you need help with ( it might as well be going to the bathroom), second it doesn't take away effort of checking tags.
Tell us if you know the answer This ties into other points, like it might help indicate the problem is with understanding a method of proof.
Add in background information $$$$ Context: in what bigger problem did this come up? Terms change meaning, depending on scientific field for example. $$$$ Knowledge: what do we have to work with, struggling might have to do with bad information, or lack orof required knowledge. $$$$ Source: is it homework, a thesis ( goes to context), a contest question, from a textbook, random thought, etc.
Tag with proper tags
Getting an expert in combinatorics, alert, to a modular-arithmetic question, waste both your time, and theirs.
Try to avoid multiple questions in one
They might be unrelated, generalizatinggeneralizing each other, duplicates of other questions, dependent on each other, etc.
Meet answerers halfway
Answerers can get downvoted for answering poorly asked questions, duplicates, or questions with little effort shown.
Avoid opinion questions
Math is logical, opinions don't really matter that much.
Tell us where you are struggling
This tells us what to focus on, it shows what actually needs answering, and what is understood.
Ask a definite question
Answers may change if the answer to your question can change.
Try avoiding duplicates
This clogs this site, Google, and generally makes it hard to navigate.
Try asking a general question
Most strict number questions, have general procedures, that don't change much if the numbers change.