Social media seems to be the obvious answer these days. I’ve relied upon word-of-mouth advertising as this is the best and most reliable kind, though possibly the slowest also. Like you, I’m a freelancer, and lately have been using stickers and business cards as part of my own self-promotion. The fact of the matter is that what works for one person may not work for another, so in business, such as life, we must learn from our mistakes and make our own dreams come true.