
A quick example:
Try to make the key/extreme-frames first, The one I have in the animation are basicly those - but you could probably get away with less if you're good.
In my its like this. (8 frames)
#1 we have Contact- where the heel contacts the ground of the frontleg, it has been thrown infront to stop the fall.
#2 then the Down- Where most of the weight/mass gets transfered to the frontleg, causing it to bend a little(doesnt have to, looks good in animation though _imo_)
#3 the Passing- The leg is/is about to passing the center of gravity, the back leg has left the ground.
#4 the High- The body is about the fall forward and the leg on the ground is pushing away a little.
5#,#6,#7,#8 is just repeating but for the other leg.
There are endless of variations and none are more correct then the other I guess, this was probably the most basic one - It depends on what kind if character you want. The tail I just indicated a little that its swinging with the body's turning (badly).
things to notice is the head and body position, they turn a little when arms are swinging.
Hope its help a little, if you're really serious about it though - get a book (animators survival kit) which could teach you more then anyone here could or would have time to (I think)