Work and fun!
Lack of time is the enemy number one! No time enough to do as much climbing and mountaineering with Airborne Ranger Club of Finland or scuba-diving dive as one like to!
Anyway, daily training for the parachute competitions and just to keep fit is "must"!
Lac of money is enemy number two... Fortunately I got some co-operation companys, which you can find in my site!