Mastering

Best recent radio placement is Number 1 on the Icelandic National Radio charts,  for mastering the song 'Eyjafjallajökull' for the artist 'Eliza Geirsdottir Newman'.
It entered as Number 2 the first week of May, and as of week 23, 2010, it is still on the list (after a re-entry).

Mastering philosophy
Listening to how the mix is, and enhancing and 'freshen' what is already there, in the same direction: so it 'sounds the same' — just better.