Borderlands 2 Tips

Easy XP ( Tiny Tina Quest)
In Tundra Express, complete all Tiny Tina's side quests to get "You are Cordially Invited: RVSP" quest.

1) Kill Flesh Stick to get from 1,500-5000XP per kill
2) restart the quest with Tiny Tina
3) Co-op mode: let a player stand by Tiny Tina and the other wait for Flesh Stick's respawn