are the big ones
as well as
Retailers from all industries
Health Related Products
Self Help companies
Everyone and anyone is keen to have you promoting
them and they are willing to pay you X% for your
time and trouble.
Go to a website and look for the word 'Affiliates'
That's a good start.
TIP: Make sure you pick a product that has a good conversion rate - say 20% or higher.
You also want to promote something that gives you a decent commission - say $50,
$100 or even higher.