Crisis Core: Final Fantasy VII Tips

New Game Plus
Beat the game once and wait until the credits are finished. Save your game into a different slot (only if you want to keep your other file). You will be able to play through the game again and choose between either Normal or Hard mode. You will also keep the following from your previous file:

DMW ("Limit Breaks/Limit Verges" ONLY, you still have to unlock the characters)
Stats (Level, SP/HP/MP/AP, ATK/VIT/MAG/SPR/LCK, Gil)
Time played