I've actually done a number of roadside tire repairs, but it has not been necessary on my T100. I had a couple of flats with my Guzzi on a 6000 mile tour the summer before last. I sure was glad I had the repair stuff, as it happened in the wilds of Wyoming and again in West Texas. My kit includes:
1) a rear tube (the fronts hardly ever get flats)
2) a new patch kit from tractor supply (the cement dries up fast)
3) a 12v pump w/attached pressure guage (spend a little or a lot-mine was from Harbor Freight. Without one of these, you'll have a really hard time getting your bead to seat)
4) 2 each tire irons (I like Motion Pro's)
5) a roll of gorilla tape (in case the rim strip grenades)
6) a can of aerosol spray detailer (great tire lube and bike cleanup aid)
7) a piece of low density plastic sheet for a tire boot (1"x3"...cut from a bleach bottle)
And a frame prop if you don't have a centerstand...I have a nice adjustable one Honda marketed for the XL600. Of course you need the tools required to remove the wheel, too.
A couple of useful tips:
1) Have at least a liter of water with you; tire fixing is hot work
2) if you lever your bike on the centerstand on the edge of the road, you will create more space to get the wheel from under the fender (see photo)
3) don't rely on a field repair for more than about 100 miles
Edit: you'll also need a valve core tool.