For cable management I use velcro ties similar to these:
One package is with two colors inside, Black and white colors. Black color--30pcs; White color--30pcs Suitable for your different colors cord management. Perfect for your home or office computer, appliance, electronics cable organization and management. With white and black colo...
www.amazon.com
Naturally these cable ties are useful around the home. I gave a few to family members.
I stick small accessories into bags like these:
Package contents: 16 zipper bags in 8 sizes and 8 colors, 2 per size. Size: B4:39×28cm/15.6×11.2inch(Orange) A4:34c×24cm/13.6×9.6inch(Purple) B5:29×21cm/11.6×8.4inch(Yellow) A5:23.5×17cm/9.4×6.8inch(Red) B6:19.5×9.5cm/7.8×3.8inch(Green) A6:16×12cm/6.4×4.8inch(Blue) Bills:23.5×10.5cm/9....
www.amazon.com
The bags I have were purchased in ¥100 shops in Japan. Their wares are far better than American dollar stores.
When traveling abroad I usually pack a 30W GaN USB-C charger, one USB-C to USB-C cable, one USB-C to Lightning Cable, a standard 5W Apple USB-A charger and the standard Apple USB-A to Lightning cable in a two-pocket mesh bag. This kit can charge a Windows ultrabook, iPad mini, and my iPhone on the road albeit not all three simultaneously.
This kit also has a really short (6") power cord that provides three two-prong outlets. This was also purchased in a Japanese 100 yen shop; I have never seen these in the USA.
I toss in a couple of small ziplocks (2" x 3") for storing things like USB thumb drives, SIM cards, SIM ejector tool, paperclips, safety pins, etc.