Making MYSQL's RAND() more random

what would be the best way to make MYSQL's RAND() more random ? my random result set always seems pretty predictable. The first record in the result set always seems to be the same 4 tracks :( Would adding some kind of random seed like RAND($randomNumberGenerator) work ? If so, how do you implement this ? $sql = "SELECT media.id,

        artist.name as artist,
        artist.spanish as bio,
        artist.purchaseLink,
        artist.picture,
        media.spanish as trackName,
        media.path,
        media.quality,
        mediaType.id as mediaType
        FROM artist, media, playlistItems, mediaType
        WHERE playlistItems.playlist_id = $myID
        AND playlistItems.media_id = media.id
        AND media.artist_id = artist.id
        AND media.mediaType_id = mediaType.id
        ORDER BY RAND($randomSeed) LIMIT 0, 30";

many thanks in advance