A business interested in generating sales and leads online can use the services of a specialized  Internet Marketing firm , which uses a combination of  Search Engine Optimisation,  Search Engine Marketing and Email Marketing to boost their business.

Some affiliate marketers are using an illegal method to boost their revenues, they are using  redirects.  When someone searches for a website,  they redirect it to their affiliate link.  They do this by infecting the computer.

One of  the most striking features of having an online business is the amount of sabotage  you face.  Almost everyday, some one tries to  hack or DDOS your website.  So when your revenues are OK, always make a provision for times when your income is zero.

One of the most important criteria for selection is payment terms. Some networks pay almost immediately, others pay on a net 15 , net 30 or net 45 days basis. You have to adjust your cash flow accordingly.

It is always important to diversify your internet income revenue streams.   You never know when a particular company will shut down or  your account will be disabled for no fault of yours.