I actually need a new bag, mine's ripped and will probably explode from all the crap in there.
Guitar cables, speaker cable (even when playing a combo, lol), patch cables, mic cables, IEC cable, OneSpot, SM58 Beta, a strap or two, string winder/clipper, tools, flashlight, headstock tuner, Strymon Iridium, picks, slides, strings, Furman power conditioner / strip, Izotope Spire recorder and a trusty weed kit.
Basically a bag of backups and crap that comes in handy at a show, and not just for my rig. I've been a mediocre guitarist for decades, but I like to think of myself as the best bandmate you could ask for.