Go to www.aopa.org
They have a paper/document on getting back into flying after a long layoff.

David Banahan wrote:
When I was young I got my license the week I turned 18. I left flying when
I left my first wife. I would like to resume flying, but want to focus on
IFR simulation (most cost effective) at home training before beginning
actual flight training. Any advice would be appreciated to help me develop
a cost effective way to re-learn to fly. Thanks David