Search for products in your catalog.
Go to Catalog > Products > Search Products. Here you will be presented with a list of products in your store sorted be Product ID (the lowest ID will be the first product you added and so on).
You can search by specific criteria by clicking on the Search All button attached to the left of the search bar.
To search for a specific item simply type in the name of the item and you will be presented with items matching your input.