Cover both sides with clear contact paper. This makes them waterproof, and allows you to mark choice locations with waterproof grease pencil. Use a dry cloth to wipe off the markings later. Look no further than a cassette tape. The screws are usually the right size.
Safety pins help keep things together.
Slide spare blades, hooks, swivels and the like onto the pin, and snap the pin shut. Now you don't have to worry about them scattering all over your tackle box. Use an outdoor digital thermometer, the kind with the 10-12 foot lead. Drop the probe down and you can measure the water temp down to 10 or so feet, instead of just at the surface. Use glittered fabric paints or glittered finger nail polish to jazz up your baits.