Tired of your mask strap entangling your hair? Replace it with an easy-to-use, super-comfortable neoprene strap.
Poly dive socks make your wetsuit glide on like butter.
Silver Sharpie marker works great for naming your gear. Lasts about 60 dives.
If you rent regulators for your trip, purchase your own mouthpiece. Sanitary and you know it fits properly.