One way to build a business even if you don't have any products or don't have a brand but have a manufacturing process is to do joint ventures.

When you partner with another person or company, you are developing a joint venture that allows you and the other person to work together in business in a way that can help an audience.

This list is specifically geared toward internet based businesses where you can literally take your knowledge and skills, and combine them with one of your friends knowledge and skills and do an exciting business opportunity together.