Step 1: 2"X2" s
Pros: Inexpensive, easy to label, compact.
Cons: Coin may be scratched by staples, the plastic in close proximity to the coin can possibly contribute to toning and spotting.
Step 2: Coin flips
Pros: Relatively inexpensive, easy to label.
Cons: Coins can easily slide around inside slides, which could result in small scratches on the coin's surface.
Step 3: Air-tites
Pros: Compact, low risk of coin damage, highly durable.
Cons: Expensive, difficult to label.
Step 4: Slabs
Pros: Perhaps the best way to store your coins.