http://www.ps3trophies.org/forum/infamous/13789-blast-shards-dead-drops-maps.html

opened the maps in pain on my pc and scribbled off each shard by location when i discovered it, also using L3 on the location to make sure it was there, going one by one its near impossible with L3 to miss one, takes roughly an hour and a half to find them all on neon and an hour and a half on the warren, a lot less as there is less than 50 on the final island, they are not as bad as they first appear.

also i found that the stunts seem to come in time, i have managed to get all of them by chance by just unloading hell on large groups of enmies, the only one that could be an issue is the have a nice fall, but i got this one by doing laps by grinding the rails around neon district, every lap around 3 enemies would spawn on the tracks and run at me every time, i just spammed the shockwave until they all flew off some of the involve throwing enemies up with shockwave, they take some effort but they arent impossible, plenty of videos on youtube and written guides from google

the story is brilliant and i cant wait to see what the sequal is like