Pretty much, try to keep the pace of your fight realistic, keep the moves flowing naturally, and ease in and ease out. Alternate between punches, kicks, slaps, and make sure that the characters take advantage of their props and surroundings. Sound is also extremely important. Make sure that you have different, realistic sound effects for each action; and make sure that you have the characters breathing heavily or grunt occasionally. Also, film a video of you and a friend stage fighting. Then, study the movements and use them in your animation. If you can't film yourself fighting, then study a fight scene in a film. Break it down frame by frame so that you can see how it looks according to your frame rate. Lastly, just practice. Nobody becomes a legend overnight, but those who practice can achieve great things.
Here is a great link to a tutorial about 'easing in and easing out'
http://www.youtube.com/watch?v=0XrRJAiIepY
And here are some links to brickfilms with some good fights.
http://www.youtube.com/watch?v=TmbeLWtX
re=channel
http://www.youtube.com/watch?v=ZsDfBw4DUd0
http://www.youtube.com/watch?v=ijpH6an-JIQ
http://www.youtube.com/watch?v=-FcQ9SUX
ature=plcp
http://www.youtube.com/watch?v=qkCn54MPvtE
Last edited by Juggernaut Pictures (July 3, 2012 (07:47pm))