Home Office Organization

I need to get a Pinterest fix, so I'm going to share some inspiration I've found there.  I need to seriously look at the organization in my home office, as I'll soon be bringing home about half of my teaching resources.  I need to find ways to store all my math, science, and social studies materials where they can be accessed if a colleague has a need.  Here are some  ideas I liked...

     

Source: sarahyoude.com via Melissa on Pinterest

This room is about the same size as mine, but has much smaller windows.  What I really love is the cubbies on the left.  That is exactly what I need - but I can buy it right now.  So I'm looking for more ideas...

Source: blog.craftzine.com via Laura on Pinterest

Are we beginning to see a theme? More cubbies.

My main problem is - of course - cash flow. I can't buy cubbies, boxes, or cute bins.  I've got 3 mismatched bookcases and that's it.  Here's a before picture. There is lots of space - but I worry about overcrowding the poor shelves!

When I start to bring home stuff, I'll post more pictures. Maybe being accountable on here will keep it from turning into a disaster area!

Do you have a home office with teacher materials?  How do you have it organized?