I have a retirement plan too! And I don't think it's weird to start planning for it early in life. You will be surprised how fast the years zip by and personally when I looked back at the past 5 years - I've not achieved much or inching nearer to my retirement goals! So yes, self reminders are important :D
PS: I love cycling and swimming! Do it do it! :D
Oh dear, time is really ticking away fast, isn't it? This is a self-reminder too.
Hope by the time i learn swimming and cycling i am not too old. ;)