For those that would like to end up with a nicely organized system, you can start out slow and begin by purchasing a few colors at a time, the cards to wind the floss onto and a box.
The winder is nice, and not very expensive, but not completely necessary as you can wind by hand.
This is how I did it. I could NOT afford to go buy every single color at once (that would have cost around $300.00, I think. :D)