for me, I have to remind myself to keep the tire down in the channel as deep as it will go, so on the first side I work on I use a strap or two to keep it down in there. this gives me more slack on the opposite side of the wheel
I also started using these
CRANKBROTHERs Crank Brothers Speedier Lever in addition to my regular levers
I also started using a
Kool Stop Tire Bead Jack to help lift the tire rather my fingers (sorry, no photo of them in action)