That means, only 10% through advertisements, agencies and so on. And that is also what most people try, because it seems easy. So you have a lower chance against more applicants.

Getting a job through networking could start with working out in which industry and job you want to work. Then you could contact someone in that industry and ask her if you can have 20 minutes of her time for an Informational Interview. People are really happy to do this, if your intention is good, because they have been there themselves, and also it's flattering to be asked advice.

You can Google 'Informational interviewing' to learn more about how to do it. From there you might try Work Shadowing (you spend a day or half a day seeing what someone actually does, without expecting pay – it's a favour to you). In this process you learn about what's really involved, and make contacts who will care about you. You don't ask them for a job, their help is letting you peek inside a job or industry. Once they know you and have your CV, they may pass on opportunities.

Joining business networks works well. For instance, a coffee group. People meet you in person, and if they hear what you can do and that you are looking, they may know of someone who wants an employee like you. It's essential you get a personal business card made to give people you meet. This can be at a low cost. At least your name, phone numbers, email and city or address. Make it look smart. Without a card, it's difficult for people to take action after meeting you. At business coffee groups you will also interact with business owners.

Another type of network is Industry Associations of the industry in which you hope to work. Remember, networking is about relationships, not asking for things. You just take an interest in others, and let it know what they can do to help you, without asking directly. They will help of their own accord.

Lastly, consider a combination Skills-based and Chronological CV. This is more effective than a typical chronological CV, because the focus is on what you can offer, and it starts with a summary rather than boring address and other irrelevant details. That can be in a footer. You need to focus on what matters to the employer.

Good luck, and get yourself out there.
References :
Experience (as employer and employee) – this works.