My favorite basic white card stock is by Georgia Pacific (found at Walmart). It's great for the base of cards, making flowers and cutting with your Cricut....
For Copic coloring I prefer Neenah Cardstock....rich and creamy
For colored cardstock I'm Paper Trey Ink all the way. The quality is amazing and I love the color selection as well as being able to order 12 sheets for $3 or 24 for $5. They also have matching ribbon ;0)
When I went to Ikea a few weeks ago I picked up these (2/$3.99) magazine files.
Inside the magazine files, I use file folders from Michael's dollar spot to separate my cardstock by color. When I first started I was writing the name of the company/color on the folder, but found that if I just cut a slit in the plastic that they come in I can just slide my cardstock out and keep the label inside the original package. This way I don't have to relabel the files if I decided not to reorder that same color.
I keep my scraps right in front of the original package, so I reach for those first :)
Stay Tuned next week for 12x12 cardstock and pattern paper :)