Best overall tip for going lighter - leave it at home. It's good to spread all your gear out that you planned on taking and split it into 1) have to have, 2) want to have, 3)like to have. Keep the #1, leave all the #3 and take only a few of the #2. While one can go "stupid light" and lose comfort or safety, I've found that taking just one or two luxury items (like an insulated mug for morning beverages, or some fishing gear, a small game or book etc.) is usually good.
Even on shorter trips, I find myself enjoying life SO much more when I'm not hurting from carrying too much. I know others can and do carry lots of stuff - I just find I do better with less.
Father. Husband. Scoutmaster.