I also created a web design and seo company so I make money with that but where my true passion lye's is affiliate marketing. It is quite simple; market a companies products and get a commission. BUT this is not easy.
SIMPLE NOT EASY !!!
This takes alot of time and money to master and there are many internet marketing products that can help you but to tell you the truth I had to spend over $10k on them Ahh! but it was worth it.
KNOWLEDGE IS POWER
There are guys that wake up in the morning and send an email, and that's there day. Once you create an email list of over 100 000 SUBS your basically set..
Long story short with everything out there and everything I've learned I would highly recommend building an email list!
Hope This Helps Someone :-)