I can't say that all of these are a good idea but you will definitely be the talk of all of your friends if you complete the entire list. Here are some highlights. I haven't even done 1/3 of these. And believe me, the ones I've done are the ones EVERYONE has done. I swear it!
Since you're only 39 or under, you've got PLENTY of time to finish this list.
Read 100 books
See your favorite band live
Learn a language
Attend a music festival
Own a dog
Learn to say no to your mother
Stay out all night partying
Make love on a beach
Swim with dolphins
Go skinny dipping
Ride a gondola in Venice
Make a snow angel
Take part in a protest
Own your own business
Go in a hot air balloon
Jump into a pool fully clothed
Backpack across Europe
Perfect a signature dish
Drink beer at Oktoberfest
Run a marathon
Get a tattoo
Have a threesome
Go to an airport and pick a random flight
The complete list is here.
Photo courtesy of kgroovy