Word of Mouth Marketing (WOMM) is very effective in the sense of self promotion! If you want to get out there and secure yourself a high position in the business world, you can network with WOMM.
Get out there and meet people! Go to places where you know successful business people will be and meet them and SELL yourself to them, in a way that is discreet. When you are in a social environment there is so much less pressure about selling yourself. Just get to know people and ask questions. When they ask you what you do, then you say you are currently looking for a job, etc. If they have warmed up to you, they will suggest you to friends or to their own company if they are looking to hire.
WOMM can be so powerful. But first you need to be proactive. When you get out there, meet people, and network, you will get to experience the power of WOMM and see how your brand (which is YOU!) will grow and get known in the business realm.