Places like Blogabet, Pyckio, Tipstertube can be very helpfull in building a portfolio and you don't want to pay any subscription for a service.

Of course it helps a lot that I'm part of an closed forum which makes it even more comfortable to follow others because of the low amount of followers.

Those bookies you need to exploit as much as possible. What kind of markets do they offer? Do you have some limits on stake?