Sorry, but I've wanted to use that line for a long time :)
In this case I'm talking about spreading the love with your clients, and there's no better way to do that than sharing information that helps them.
Often people think, "if I do that they don't have any reason to pay me." If that's the case, you should be looking for another career. There are tons of things you can share with your customers that help them without undermining your ability to make a living. In fact, you'll find it actually ends up helping you.
Think about it, there are a number of reasons for that: