It is probably impossible to start over from scratch when you have so much baggage, but then on the other hand it means you don't have to start over from the very beginning, but can make use of some of the skills you have picked up along the way.
I read a friend's blog and realized I have not written anything but lectures since the March of this year. I do not do any research, I do not write, and I am not even reading much right now, except the handouts on how to use the computer software I need for work. SO this might be a good time to start writing again, and start reflecting on life, current and past, in longer stretches than the random thought popping through my head now and then.
So - write - think - grow.