If you look at an asset in the Project Panel you'll see a small icon that looks like a strip of film - it indicates that the asset is used in a sequence. . . somewhere.
I don't know if this is a feature - if not, maybe it's something that can be added to a wish list - but I would like Premiere Pro to tell me where in the project it is used. Sequence and time/stamp. . . I've had the need recently to find one asset among 60-80 and the only way to do that is to scrub through the whole sequence, and I ALWAYS miss it the first time. It's very time consuming.