To perform the following trick go to Three Horns Valley and then northwest on the map to the hideout where you fight the Bad Maw boss (next to the entrance to Bloodshot Stronghold). Pick up the Eridium Mad Maw drops when you have defeated him and then go to the Bloodshot Stronghold and choose the 'Save and Quit' option. When you continue the game return to Three Horns Valley and defeat Bad Maw again to get more Eridium. This can be repeated as many times as desired.
How trusted are this members submissions. Higher ratings are reached by having more submissions, being a pro submitter, a game expert and having good thumb ratings for sufficient submissions on the site.