A couple of tips from the "man of a Thousand punctures", at least it feels like it after yesterdays event
. Yes I had Yet another bleeping puncture,despite reasonably tuff tyres and sealant in the tube. I ended up with a tyre full of sealant which I had to scoop out with my fingers while being perched on a 2foot wide grass verge on a very busy A road and having picked the top of an ants nest (Unknowingly) to carry out the repair.
As it was warm, I was able to use plastic tyre levers, but I always carry a couple of small steel levers in case the plastic ones give up, although they will mark alloy rims and I have no knowledge of Carbon rims at all.
Prior Practice is invaluable, as is the case with pitching tents before arriving at the campsite in the rain at night!
I always put a ball point pen mark on the left side of the tyre in alignment with the valve, If I have to remove the tyre I can always get it back in the same place.
If the site of the puncture is obvious, it is sometimes possible to just pop the tyre off just where the puncture is without removing the wheel from the bike and patch as normal.
Hope some of this was helpful