push starting
there's a trick to doing it, for the old and gimpy, yes I'm talking about myself.
set it up just like you normally start 'cept put the kick stand up, put in 1st
others will say 2nd or 3rd, I say 1st cause when it kicks over it's going to sputter and die if you take the clutch back in. This way you can leave the clutch in till it runs right.
So, clutch in, stand up, kill switch on, 1st gear, and you're standing beside it.
Now run like heck, don't forget the bike

jump on and push the starter button and immediately let out the clutch.
as soon as the clutch goes out, it'll lock out the starter so don't worry about letting go of the starter button. it'll chug chug thump... thump thump thump...
you might want to have it in prime to make sure the bowl is full.
Alternate to pushing the starter button is to rotate the engine to the exhaust stroke.
put it in the big gear, bump it forward until you can rotate the decomp lever by hand. then it's in the exhaust stroke. don't forget to put it back into 1st.
DON'T PUSH THE BIKE BACKWARD!!!
This engages the starter clutch, on pre90's bikes this will bust out the starter gear bosses. On a post90 bike you will hear a twang instead, that's the torque limiter doing its job.