Putting up an online business is one good way to help you find opportunities to make extra money online. In fact, you can make a successful business online and enjoy more profit that you have expected. In the online world where you can sell anything to a worldwide audience, it is possible to put up a profitable online business and make good money out of it.If you are looking for a profitable online business that would suit you best, here are some ideas that you might find helpful.- Internet marketing business. If you are knowledgeable on search engine optimization, pay per click marketing, article marketing, affiliate marketing and some other effective strategies in marketing and advertising online, putting up an internet marketing business online can be a lucrative choice. Of course, there are things that you need to learn and master to be able to pull off a good internet marketing business and beat competition as well in this highly competitive venture.- Consultancy business. Another profitable business you can venture into online is to become a consultant in a certain field of expertise. You can be a computer consultant, an online credit consultant or a consultant any other expertise. Of course, to be able to boost your business success, you have to make sure that you are also well-equipped with the right knowledge that can truly help people who need it most.- Setting up your eBay business. Online auctions have gone a long way as a profitable online business. You just can’t make money with the things that you have at home, you can also put up an eBay business where you can build contacts with manufacturers, put up an online eBay business with your own products. You can also opt for products that are rare to find such as your own native products or those that you would not normally find in departments stores. This can be a good start in making eBay your avenue to make a profitable online business.- Write and sell books online. If you are a writer or you are an expert, then write your own book and sell them online. In fact, eBooks are now a good trend and authors find it advantageous for them to write and publish books online as this will save them from printing costs and other costs involved in making a hardbound or softbound book. Reproduction is also easier online as well. You can also sell as many copies as you want. People who are looking for information go online for answers, thus having your eBook online can also be a good venture.There are indeed a lot of profitable online business that you can venture into. Depending on your expertise and your interests, you can actually make an online presence and market your skills online as well. The fact that you have a worldwide audience online, finding people who are interested in your business may not be that difficult as well.