Everybody loves extra income, especially when you can do it at the convenience of your own home on the Internet. No doubt that you must watch out for websites trying to scam you, but for every scam websites out there, there is a real one to make money online.

As we know, there are 3 simple ways to earn money -- simple not only because you can earn money from home and no capital needed, but also not much time. The key is you have to concentrate and focus on stuffs that invigorate you that you know well.

Giving advice? I can't even give advice to my own children, let alone to other people. But bear with me at the moment, since, I can tell you that this is perhaps the simplest way to make money online. Why? If you have been doing your job for quite some time, you are likely to be an expert at it. As simple as that may sound, you will find that it's also simple to make money --- no need to make any products or do anything much to make money. Just login to an online expert consultation marketplace to give advice online and get paid.

One tip: Choose a website with free membership so that you can become an advisor pro-bono. Why is this important? Unless you are as famous as Bill Gates, you need to build a rapport in the marketplace by giving advice without pay. A good website will allow you to give free advice and cost you nothing. Only when you have a credible rating there can you start charging money.

To sell advice, you need to register as an expert to websites like AdviceReady.com where you can give advice to people online and get paid. If you are good at this, perhaps somebody will employ you as a permanent consultant in their organization. So keep your fingers crossed.

No surprises here after you've read the the article above. You can make more money by writing articles, courses or manuals about your expertise. The format could vary from how-tos, manuals, articles, wikis, or even courses.

The key here is to start small since you might need some time and some research into your topic and to start by writing stuffs that you understand well. This may sound daunting, but if you write about stuffs that you are passionate about, you will be producing great articles in no time. Write a few and get nice passive income. If you write good articles, perhaps you could be employed by a magazine or a publication and you can say goodbye to your old boring job.

Proof-read your writing and submit your writing to websites that share the revenue with you, such as HubPages, Squidoo, eHow, and AdviceReady.com

Is your digital camera just twiddling its thumbs (assuming it has them)? If so, then don't forget to take your digital camera with you at all times and start taking pictures, the more the better. As soon as you are home, start reviewing the pictures -- not because you want to re-live your day, but because by doing this you will soon learn how to make the best out of your camera and compose good pictures. Nowadays, digital cameras now are so advanced and they will produce good pictures.

In no time, you will have an assortment of your best pictures. Upload those pictures to stock photo marketplace websites so that people can buy your pictures. Like writing articles, your pictures will give you a nice passive income, and who knows, may be someone will offer you a job as a freelance photographer.