Ask HN: What do you use to track your workouts?

I've been working out for several years and about four months ago I started running and swimming as well. Currently, I track my workouts by using Giles Bowkett's Calendar method (http://gilesbowkett.blogspot.com/2009/11/time-management-two-pics-two-books-one.html), highlighting on days that I do a workout. Additionally, when I run, I write down my distance and time.

What do you use to track your workouts? Also, do you like using it, and do you think that it is worth the time? If so, why? Thanks.