What happens when you set a goal and don't quite reach it?

We must set goals, right? We aren't perfect though and sometimes things happen, circumstances change and we don't reach a particular goal. What then? Your attitude is KEY. Check out what I thought was a great blog by lululemon about seeing the "silver lining". Keep setting goals!!!!!! 
http://www.lululemon.com/community/blog/?mnid=mn;blog