I basically follow two "rules" when I use my bands which are based on how I saw the original bands in Apple's product photos used them early on.
For bands like the regular sport bands and similar with one short and one long piece, the short piece always goes on top.
For bands that folds around the connector like the Alpine Loop does, I have the fold at the bottom. I remember initially wearing the folds in the top, but changed it after seeing the Milanese loop images. Now I think this feels and looks beter with most bands.
This is how I prefer it anyways, but it's really just a matter of preference honestly. I just like to have a set way of wearing all my bands consistently haha.
Before I found an app that could make Wallet passes for my store cards, I used this page to have the QR/barcodes only a swipe away on my lock screen.
Took screenshots from the store's apps, added them to individual albums and then added the Photos widget, selecting the album per widget.
You could also stack them to be able to just swipe between the codes. This may even work better to avoid scanning the code next to the one you meant to scan.