You must be in Act 3 and able to craft the rune of valiance. Get any two different pieces of equipment (not the same type of course) with at least 1 rune slot. Craft a rune of valiance onto both making sure that the amount of attributes added on each item is different. Equip both items. Now remove the one that adds the most attributes first, then remove the other. Not all the attributes from the rune will be removed and it will be permanently added to Hawke. Repeat equipping both and removing both to keep getting attribute points all the way to 100 max in everything if you want. Remember to make sure to equip and remove the item that gives the most +attributes first.