Never jump without making sure the surface is safe - solid, flat, clean, well lit, and dry. The best bet: concrete. Stick to outdoor areas that are free of hazards and give you plenty of room to maneuver (you'll need several hundred feet of clear surface on all sides).

Define a field of action before you start a session, and have the discipline to drop off the Flybar if you near your edge. Make sure to check and obey laws regarding use on public property.