I try to take the stairs when ever I can.
At my last job I had to carry sample books to the clients. Talk about a good work out - lugging heavy sample books up & down the stairs! I did get some funny looks sometimes.

My daughters & I went into Boston one day and one of the subway stops in Boston has an *enormously* long set of stairs. They took the escalator, but I was going to show them I could get up to the top as fast as them. I did not take into account I did one of the longest rides I have ever done the day before.
Up I go and do quite well for the first half, then my legs say to me - excuse us, but you should have consulted with us legs before you decided to show off! My poor leg muscles were quivering by the time I got to the top.