Ask before telling

If you've created or are in charge of a product (or something else), you're going to get a lot of questions from various people. Answering questions is important, so finding a way to make this scale is critical. When come asking, turn it back on them. I believe this approach not only teaches them to be self-sufficient (to some degree), it also helps you by getting in their head rather than just giving them the same answer you've given dozens or hundreds of others.