Anything left out? The kitchen sink? Just kidding.
If you are going to carry spare chain links, carry a _good_ chain rivet tool. Park makes a good light one. I always carry one -- and have never had to use it. I am not a fan of multi-tools, preferring to carry the real things (spoke wrench, allen wrenches for everything on the bike,.
Since you wear eye glasses, bring a repair kit for them, in case you lose a screw.
Map(s)?
Camera?
Spare spokes? Cassette removal tool(s) in case you break a drive side spoke?
Chain lube?
Tire irons? (since you are otherwise prepares to replace a tube (three tube sizes?))
Rain gear for riding?
[If you're going to eat in restaurants, why 5 plastic spoons?]
Mailing addresses if you want to drop someone a postcard?
Phone numbers in case of emergency?
When you get to wondering about what to _leave behind_, I have lots of suggestions of things you'll never use, could easily do without, or substitute with something you are already taking for another purpose, or should be able to easily find along the way if you needed it. The list has way more stuff than necessary for a lot of items.
If you "calibrate" your fingers by squeezing a properly pumped up tire, you don't need a pressure gauge at all.