We put out salt and mineral block where we hunt but we put them out in july and august so they have time to dissolve into the ground a little and the deer have time to find them. we tried putting them out in the middle of the season a couple of years ago and didn't get any action on them at all untill it had rained for almost a week staight and then they just ate the dirt around the block to get the minerals. we aslo use peanut butter. we get it from a plant in Mississippi and it's the stuff that they can't use and we get a 55gal drum for $100 and we but it in coke boxes and bury a little and the deer eat HUGE holes in the ground we have one where they ate a 1ft deep hole!!! i will try to get some pics from the gametracker that my dad has and put them on here so you can see it in action.