Damage Types to shoot:
Angel - Explosive
Blood - Thermal
Drones - EM
Gurista - Kinetic
Mercenaries - Thermal
Mordus - Thermal & Kinetic
Sansha - EM & Thermal

Damage Types Dealt:
Amarr Navy - EM / Thermal Angel Cartel - All Types
Blood Raider - Thermal / EM
Caldari - Kinetic / Thermal
Gallente - Kinetic / Thermal
Guristas - Kinetic / Thermal
Minmatar Fleet - Thermal / Explosive
Mercenaries - Kinetic / Thermal / Explosive
Mordu's Legion - EM / Kinetic / Thermal
Rogue Drones - All Damage Types
Sansha's Nation - EM / Thermal
Serpentis - Kinetic / Thermal

Helpful places:
http://eve-survival.org/wikka.php?wakka=MissionReports
http://eve-agents.com/
http://evemon.battleclinic.com/
http://wiki.eveonline.com/en/wiki/Rookie_Lowsec