I have had several of those " someday somethings" over the years. I wrote them down by signing up for the events and then knowing that I had to train to achieve them would become somewhat painful. Who wants to get up at 3:00 in the morning to do a century on the bike to train for a future ride? What is it with this "man against self" mentality?
Some people seem to be wired to get motivated by such things. What about other less "painful" goals? I want to go to Switzerland too. Someday I will. There is an element to doing these things that says the timing is right. The fact is I could go tomorrow if I really wanted to. It wouldn't be totally imprudent. I can afford it and I can take time off if I wanted to. There are just other priorities and the enjoyment I would get from going there says now isn't the time.
One other someday something was to go on an a more adventurous scuba diving trip. Some friends had gone to the Galapagos Islands. They were planning another trip. Several had dropped out. When I heard about it I knew I wanted to go and I signed up to replace the drop outs. It was about a year away so the preparation and anticipation were half of the fun and the trip was not a let down. I took one of my sons to share it with and another of my close friends.
My desire to ride from Mesa to Payson someday was just an idle thought for many years. While they are calling it one it is not really an epic ride nor even that a scenic of ride. Then a local bike shop and sponsor plan a group event to do it. Like most of my "someday somethings" there may be some hurting to train and then to do it. The pain I experience however is just enough to keep me from sinking into the couch. Every time I do one I ask myself numerous times; why am I doing this? I am not sure that I have ever really answered the question.