You got on an airplane, picked up your rental car and checked into your hotel. You put on some nice clothes, met a lot of interesting people, and learned some cool new things.
The conference ends and you go back to your hotel room. You take off your shoes, change clothes, and begin thinking about your trip back home and what faces when you get there. The kids, the dog, you need to do laundry and go to the store, etc.
Hold on. You just attended a conference that comes with expenses and your boss expects to see a return on his/her investment.