My start was(and still is)in Marketing Fitness programs. My Business Partner and I put together some very hardcore fitness programs designed for MMA fighters and those who want to look like MMA Fighters. It's a super tight niche but is becoming more and more competitive which keeps the value for the customer.
I have also done some work in the IM industry and have worked with one of JV Notify Pro's members on the creation of a product which will be due out in December.
The reason why...well I am actually passionate about it and find it enjoyable. I have been able to coach a couple of people in the fitness side on creating their own products, one of which had a thousand dollar day 10 days ago. That was very rewarding and it simply confirmed what many of us here already know, which is the power of the internet.
Cheers
Todd