If you're trying to put together a debt management plan without employing a professional company then learning about debt is a good place to start.
Debt trending is one thing that's useful to learn about as it gives you an idea about when and why you spend, which can often hold the answer to improving things.
You might find that you're spending massive amounts of money on things you've never really thought about. Even the smallest thing can mount up if you're paying for it consistantly.
Learning about your debt is the first step towards managing it, and that's a tip you don't have to pay for.