Look at the details
Compare the pose and dimensions of the particular figure, then imagine it in the space you have. A small arrangement can give each object more presence than a crowded shelf. Edition details and condition should be checked using clear, specific information about the actual item.
Keep a useful record
For a collection, save the exact item name, identifying details and condition notes alongside your own photographs. For daily use, keep the care or setup instructions somewhere easy to find. A clear description is more useful than a broad category name when you return to a piece later.