When I'm going to bed or otherwise want to relax I find light reading helps a lot. Here are a few of my favourites:

• Three Men in a Boat by Jerome K. Jerome
  • Written in the late 19th-century but still amusing to read today.
• Neither Here nor There by Bill Bryson
  • Travel writer Bill Bryson's account of his travels in Europe is hilarious, easily the funniest of his books in my opinion.
• Notes From a Small Island by Bill Bryson
  • Probably Bryson's most well-known book. Chronicles his travels in Britain. Very funny but I enjoyed Neither Here nor There more.
• Afloat: A Memoir by Danie Couchman
  • A woman's memoir of spending five years living on a narrowboat in London's canals.
• Rig Ship for Ultra Quiet by Andrew Karam
  • About life on a nuclear submarine during the cold war. It's a light read as it focuses on the day-to-day life of submariners rather than on military operations -- what the food is like, what kinds of jobs people do, what the sleeping arrangements are, and so on.