I was traveling for work recently and got to chatting with a couple guys who were my senior by about 10-15 years +/-...
The one guy (guessing he was 65ish), said the key to staying young is to put your socks and shoes on while standing up. If you can do that, you're not old yet.
My response as a 46 year old was: Why even bother trying? The bed is literally right there! Of course the next morning I had to try it, and gotta say, it was tougher than I anticipated, but I did it! Every day since though, it's gotten easier. I hate older guys, they always end up imparting me with knowledge when I least expect it! LOL