I carry little Sting Goes individual wipes with me but these are hard to find sometimes. Recently I got a little pen of After Bite to carry with me but I havent used this yet so can't say if it works as well as Sting Goes. My first organized ride I got stung on the shoulder by a bee. Lucky I had Sting goes in my bike bag. Wiped the sting site and away went the pain and I was able to finish my ride happily. I always carry sting relief with me now when I ride.
The most effective way to do it, is to do it.
Amelia Earhart
2005 Trek 5000 road/Avocet 02 40W
2006 Colnago C50 road/SSM Atola
2005 SC Juliana SL mtb/WTB Laser V