Save your money on cheaper bags that claim to be water proof, they aren't, only Ortlieb will keep your stuff dry and preform like it says it will. Truly the gold standard. Amazing product!
These are some of my favorite ways to refuel while riding. Good flavors and easy to eat, although can occasionally be a little messysticky and I have to be careful about squeezing it up while riding.
My favorite flavors are caramel, vanilla, and caramel macchiato, all with caffeine.
Indoor training using smart apps.
This is a tried and true way to ensure you don't get chafing in the sensitive areas. Especially for the long days in the saddle 100 miles, but also for short rides if you ride more than a couple of time per week.