I am a bit of a completist, so I will find an author or a series and read it from oldest to newest. Problem is, I have caught up to current on most of my authors so I have to wait 12 months for the next installment.
I just started reading The Deep Blue Good-by written by John MacDonald. It was published in 1964 and he wrote 22 books in that series. I was worried that I wouldn't enjoy it enough to continue the series, but I am definitely planning on finishing the series now that I am 1/3 of the way into it.