Final Fantasy XIII - Tips and Tricks
To make sure you find every treasure, check all paths, even the dead end
ones, check behind you when you reach a new area and don't be afraid to
stray a little of the beaten path.
The game has a very useful datalog that gives you information and tips on
how certain things work. Be sure to check it every once in a while to make
sure you are up to date.
All members, including the once not participating in battle get the same
amount of CP after battle. Therefore you don't have to worry about
characters getting left behind. Fill out the CS for members not
participating in battle as well, because you never know when suddenly the
party is changed and you find yourself with a party that is not leveled up
Pressing L1/LB during encounters will open the Enemy Intel and shows the
information for the enemies you are facing at the time. Use this often to
see the weaknesses for the enemies. Using Libra will fill out the ? faster
than just attacking and defeating the enemies does.