How to get the tyre back on to the rim easily? What is the best/easiest way to get the tyre back on to a rim after removing it to fix a puncture for example?

Some tyres can be really hard to get back on to the rim. I don't like using the tyre levers as I usually end up pinching the inner tube and making another hole. I can usually do it with just my fingers and thumbs but it takes a lot of time and effort (and sore thumbs).

Note, this is for a 26" mountain bike wheel with inner tube.
I always use levers to get the tire off. Never to get it back on! You'll most likely pinch the tube if you do and have to start again.

The Schwalbe Marathon Plus tires are one of the most notoriously difficult tires to get on.
 This youtube video shows you how to do it without levers and without hurting your hands or getting blisters.


                
              

You only need two toe straps or a similar strap, to push the tire bead into the well of the rim on the opposite side to the last bit of tire you're trying to get back onto the rim. As you'll see from the video, just keep working the tire bead into the well of the rim on the opposite side and you'll get it on, no problem.

This was a saviour for me, since before that I'd get blisters and sore hands and it could take me an hour to change the Marathon Plus. Now it takes me a little over 5mins, with no blisters or sore hands.