Oh, I misunderstood. I thought you were asking us for a way to store your collection, as opposed to getting ideas from the ay we store ours. No biggie.
Baseball:
I have all my commons in 5,000-count moster boxes. They are sorted by year, company, and numerically. They are all available for sale or trade.
I have my complete sets in either appropriate count boxes or in pages in binders. They are on shelves wherever they fit.
My Phillies collection takes up 9 binders. 10 if you include my son's Darren Daulton collection. They, oddly enough, are stationed on my floor right now, with the "newest 8" on the bottom (upright, not laying flat) and the oldest 1 laying flat on top with the Daulton binder on top as well.
HOFers are in 3 or 4 binders now. They are all over. Hence the reason I'm not sure on the count. I still have some that are in a 5,000-count box with current stars (HOF-in-waiting?) that I haven't sheeted yet. I have a 5,000-count monster with my HOF extras (filled! - they are available, too).
Thick cards (Silver sluggers, etc.) are in team bags with brand new top loaders in front and back and on a shelf on display.
Hockey:
Sets are all in binders (on shelves, in mostly chronological order). Commons are in 2 3,500-count boxes (same sort as the baseball). We have about 15-20 binders filled with player collections (and 1 misc Flyers binder). Somewhere, I have a box that has some inserts and parallels. (No Ranfords.)
Star Co.:
They are all over - mostly in large boxes (think larger than a case of paper). I do have my "set" in plastic bins (they should be in chrono-order). Mostly extras and MiLB sets in the large boxes. (They do get heavy - about 45-50 lbs each!)
Then there are the cards I'm actively trying to move - they sit on a table right next to me here. I honestly have more than I can deal with.
But that's how I have them. :)
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).