I have the same problem!!! I say to myself "I'll just check PMs quickly then get on with my housework" then 2 hours later I am still sitting here!!!

Luckily now I have a housemaid so there isn't too much to do! (I love her to bits, and the first thing she does every morning is play with the cats for 45 minutes - she is great!!!) PLUS no more worries when I go on vacation!!