erm.. I just wanna comment on how Diggers' garage has gotta be the most well kept garage in the world...
I hang my head in shame.....
But on the good side I'm doing my bit for the spider population..
As for the original question.. It's a knack and all about balance..
As mentioned I put into 1st to be safe, Hold the front brake and from the right side pull the bike towards me whilst sitting on the floor..
If in doubt have a friend hold the handlebars from the other side..
The last thing you want is to let the bike fall over, worse over you..