To quickly perform your pre-ride inspection of critical nuts & bolts, consider the following technique.
Put a small dot of Tipp-ex on the fastener head and a corresponding dot on the surface or body that it is being tightened into. The idea is that you'll quickly be able to see if the two dots (lines) are no longer lined up, meaning that they've loosened.
You can accomplish the same task with a Sharpie. However, unlike Tipp-ex that can be scraped or washed off with water, you'll need to use a bit of solvent. I use the Sharpie method because I already have a number of them on hand.
If you have a variant of this approach, reply below in the comments section. I'd love to hear what others are doing.