Use full band names unless abbreviations are more common, as in NWA. Enter artists in 'Firstname Lastname' format; eg David Bowie. Denote a soundtrack by appending (soundtrack), eg Pretty In Pink (soundtrack). I'm still confused, show me more examples.

As this program functions on similarities, particularly eclectic selections may not generate useful results. If this is the case, try selecting entries in similar genres and not the most extreme orthogonal tastes you possess. Still confused?