Congrats on your new bike!
I move around a lot so I've had time to put this stuff together.
I recently bought a 3 AA battery LED flashlite to put in my bag, its bright and lite.
I've not had good luck with fancy tire plugging kits. I use the standard tire plugs you can buy cheap and they work the best in my opinion. I made a believer out of my riding bud some time ago with those, around 7 bucks for the kit (w/the plug tools).
I also carry a number of CO2 cartridges. I don't really like that idea but overall, I think they take up less space and they "fit" easy, since I just toss all that stuff in a small soft bag/sack. Make sure you have the valve adapter for tire/fill valve.
water water water always...at least out here! you could die out in the desert heat if you don't carry this stuff if you get stranded for awhile.
I also carry food for the times i'm too tired or too late to get dinner, consists of chocolate (of course
) pop-top cans of tuna, peanuts (in a bag) and wheat crackers, doesnt' take much room to store.
oh, and don't forget your fav cigars, they come in handy when waiting for a tow
Visa and a cell phone (used to carry a gun instead but I can't call a for a tow with a glock 21)...you'll also cause no harm to your machine when it breaks if you happen to be a type A, when you leave the glock at home
something to clean your visor/glasses with, any important meds, stowed away from the main bottle in case you forget em (ie, always in the bike bag).
Only a couple tools on board, can't carry everything! For risk mitigation, I ensure my tire treads are always a good distance from the wear bars, even if I replace them sooner than needed (easy since I do my own tires).
Most of this stuff stays in the bike bag so it is not forgotten, food being the exception.
I also carry at least a bikers rain coat (bmw), it is good for sun protection as well as rain & cold and its light wt.