In theory, that is very easy to answer. Condensation is caused when warm moist air either receives more moisture, or gets colder, or both. The solution is simple: stop the addition of moisture (by stopping the generation of moisture or venting off excess moisture), or raise the temperature, or a bit of both.
That sounds so simple that you probably won't take this guideline seriously. But as you study your moisture problems you will see that every solution tries to hit a practical balance between stopping or venting the source of the moisture, and raising the temperature of the problem area.