Well, take advantage of empty parking lots. Maybe one thing is that in traffic, you worry about the cars and people.
And try not to worry so much about falling, its gonna happen... believe me. Just relax and try to remember what youre doing thats making you stand so you can apply it next time. But yeah, you should practice without being clipped in just in case you do fall. Plus, girls dig scars.
So after you get the hang of that, try it with one hand.