The work envisaged in the building of this tag is probably more likely to be desk-based rather than physical, outdoors etc.

Music that is good to help concentration and focus when typing, report writing, dealing with spreadsheets, administrative work, project planning, coding etc is likely to have the following characteristics:

1) Have no lyrics, very few or simple lyrics, or lyrics in a language the listener does not understand

2) Fast paced music like Drum & Bass can make one enormously productive

3) Abstract music, for example tagged "Free Jazz", "Minimalism" or "Avant Garde" can be extremely stimulating and Rauscher, Shaw, and Ky (1993) investigated the effects of listening to music by Mozart and found a temporary enhancement of spatial-temporal reasoning. http://en.wikipedia.org/wiki/Mozart_effect#cite_note-shaw-3

A tag like this is probably particularly suited to those who like an eclectic mix, otherwise the listener would be more likely to play a playlist or could listen to an album.

Listeners who dislike more popular genres like Drum & Bass may want to consider http://www.last.fm/tag/quality%20contemporary%20thats%20good%20to%20work%20to