I'm a "composer" and for the record, you will find no download of my music on this post
I have some advice.... listen.
Get some super-holywood dramas and watch them... listen to the scores. Perhaps from composers like James Horner, Thomas Newman, Howard Shore, and one of my favorites as of late (and if some of you classical pianists have heard this guy, you might agree" Marcelo Zarvos and Peter Vronsky. Watch the movie "Door in the Floor."
Or "Adagio for Strings" its a classic from the movie "Full Metal Jacket"
The BBC Orchestra performs: www.youtube.com/watch?v=RRMz8fKkG2g
Okay, so those are examples of "sad" songs with pianos and strings and all that good stuff.
Listen to some of Moby's music. I don't like him personally, but there are a couple of really good "sad" songs that give you a match with the electronic music genre.
As far as direction for coming up with your own stuff? Keep it simple and minimal. Maybe have two or three argegiations, loop them together, throw some strings over it.... but remember that the singer is carrying the melody...