Pay per minute phone call consulting involves offering consulting services over the phone where the customer pays per minute.

Clarity.fm offer this and you can apply to be listed as an 'expert' within your niche on their site. In return, you'll be able to run your consulting phone calls through them, and you even get a widget for your blog.

You can check out my Clarity profile here.

Advantages: Offering phone call consulting services through Clarity is really easy to do (as long as your application is accepted). You can then advertise your consulting services or just friendly advice within your blog.

If you're regarded as a credible individual within your niche, then you have a lot of scope to bring in more revenue from your blog. I can personally vouch for this method and it's a great extra earner on top of what I'm doing.

Disadvantages: First, you need to have some kind of authority/credibility within your niche to be able to be accepted into Clarity. Secondly, you need to make sure that you have value to give within your phone-calls, and also that you have free time to manage the extra workload.