Try some Tai Chi Chuan, or ChiGong, or relax into learning yoga. More awareness of your body will help loads.

Watch other people walk. Imitate them. But not infront of other people.

Stretching will do the most good. Running, some martial arts, things like that.

And watch the Monty Python episode about the Ministry of Funny Walks. Temendous houmor.

U need a small thin towel and a round bottom medium vessel filled with water. Ready, here we go – twist and make the towel into a round object, place it on your head, keep the vessel filled with water over the towel on your head. Balance it properly and start moving slowly towards the other end of the room without holding it with either hands. See that ur movement does not spill the water. Practise this and lo and behold, you have a new walking style within one week. When u r walking, always imagine that the water filled vessel is on your head and you should not let it fall.