[prknight]

First, I wouldn't focus too much on the total amount, instead work out what you need to make per month, per week and per day and you'll arrive at an achievable non-astronomical sum. Focus on that. Stay in the present.

Second, let go of guilt&pity when/if it arises - it's destructive, along with any thoughts or opinions that condemn whatever got you in the situation you are. Ask better questions, like 'how is this a good thing and what is going well?' and 'what can I do better today?'. You can clear your debt with the same force you created it: compound effects over time. It's all about making small forward steps, every single day.

check out wealth dynamics to get some different ideas about mindset & money.