Discworld

There are many ways to read the series, obviously, so I am curious as to what are people's preferred method.

I read them chronologically by publishing date the first time, then once by theme (Watch, Witches, and Moist novels first) and then been reading books here and there kinda randomly (although when I read one Watch novel, I tend to read all of them to the end, plus Raising Steam).

What do others do?