In my last post, I encouraged those so inclined to create their own financial planning spreadsheets.  However, I didn’t provide enough detail to allow the motivated reader to go and set one up.  This post fills that gap, providing enough specifics to enable anyone who knows how to use a spreadsheet to map out her financial future on a home computer.  If this sounds like something you might want to do, read on! Why Go to the Trouble? But, you may ask, why should you put the time and energy into making your own planning spreadsheet from scratch when there are plenty of powerful software programs out there that will…