Most of my best tips I got here.

I use a piece of "Bubble Foil" under my sleeping pad and folded up as a seat pad and back rest when sitting.

That's really the best multi-use hack for lightweight gear I can say I've came up with. It provides both protection and additional warmth for a sleeping pad and makes a great sitting pad that keeps your buns and back warm and comfy. I also used it under my bag in my hammock in some pretty cold weather and it worked great. I'd say probably better than a down quilt. I can't say for sure, but I did test it with and without it and the difference was amazing. It's not enough padding for me to ditch the sleeping pad, but it might be for some.

_________________________
--

"You want to go where?"