Grocery List Time Saver

So I am a list person.  I like having a list at the grocery store so I don't forget anything.  I like making a menu so I know what I need to buy and don't throw food away.  I like listing what I need to get done, and I love the feeling of accomplishment when I get to cross things off my list.  Unfortunately this uses a lot of paper and I never keep the lists in the same place.  So I made myself a master grocery list on excel.  I wrote in all the groceries we buy on a fairly regular basis, listed by area of the store/type of food.  One column for frozen food, one for produce, etc.  I then laminated it and hung it on the fridge with a dry erase marker.  When I realize I need something I just circle or highlight it, with a special note if needed, and when it is time to go shopping I just grab it off the fridge, and as I put an item in the cart at the store I wipe off the mark.  Easy and saves me lots of time and hassle, as I find I forget things less often now.  Plus I am saving a ton of paper.  It is all good!  I am finding it really helpful to stick to what I put on my list too.  What other time/money savers do you have for grocery shopping?