Hart and I spend a lot of time bagging peaks. However, we found that even after a bazillion times, we would still have that feeling of, "did I forget something?" I created this list as a quick check before we head out the door. Keep in mind, when he and I are using this list, we are usually headed to over 13,000ft which means several hours out in the elements.
The above link is for gear/shopping list. This is to help you find the gear you need. Use this list to gather items you will need but understand this is not a packing list.
Here is a copy of the itinerary we use for trip planning. There are a bunch of tabs along the bottom which inlcude separate sheets for shopping lists, packing lists, and menus
The above link provides good information about how heavy a pack should be.
The above link is a great reference to review before you begin to pack.