I feel bad if I didn't use every single piece of clothing in my bag. That means that I packed something wasn't needed. But, then again, if unusual circumstances had occurred, like unexpected cold or wet weather, it would have been used. One has to strike a balance.

I have to take a CPAP machine with me. The one I use is reasonably compact, but there are smaller ones that aren't covered by insurance. Is it worth the out of pocket expense to get one that is considerably smaller?