I guess the only couple things I'd add is that the what Jur has done so well showing is...the FIRST time I take a tube off I make sure the wheel has the thinnest rim tape/protector possible. Filament packing tape makes great rim strips. Cut to width to fit down into the drop center, it will do a great job of covering the spoke nipples and holes. By minimizing the rim strip thickness the tire bead drops further into the drop center and better allows "tool-less" tire changes.

I would also add that I personally like to use the heel of my hands to roll the tire over the edge of the bead that last 6-8 inches. It seems to work well for me.

IF you haven't mastered this tool-less strategy...I'd suggest you get a QuikStik brand tire tool. You'll throw your other tire tools away after using this little beauty! Super simple and virtually eliminates pinched tubes on the way back on! Try it...you'll like it!