SAFD - People have covered a lot of my tips already, but I have a few tricks that I've learned.
1. If you want to try a new fuel, go to The Feed website and they sell single servings of almost everything. And if you get on their mailing list, you can sometimes get free shipping although they've actually been doing free shipping for the past month or so.
2. Don't forget about trying "real food." I use applesauce, maple syrup, pretzels, goldfish and rice krispie treats. But the best thing EVER for me is a bottle of Coke. The quick shot of water, sugar, and caffeine late in a race is - chef's kiss - perfection.
3. Consider using different flavors. By late in a long run, I'm often completely over the sweet/fruity flavors so I try to also use some "tart" flavors (for me, it's cola and root beer flavors).
4. I prep my fuel to make it easy to consume. I use gummies, but I cut them into quarters to make them easier to chew. (Did you know that gummies and jelly beans can freeze? - don't ask how I found this out!) I also use Tailwind, but I put enough to fill one water bottle in small ziploc bags from Michael's (they are in the jewelry department) to make it easier to carry and mix.
Oh, and in case anyone missed the memo at this point, nothing new on race day. And don't wait until November to start figuring out a fueling strategy. Start trying things now!