There are certain conditions that must be met before you can properly relax...
Sorry, all you parents out there, but Rule #1 is no kids - that way there are no interruptions.
There has to be a little of whatever you fancy close to hand... beer, a nice crisp white, a light quaffable red, scented candles, soft duvet, strawberries...
Then you need whatever makes you "feel" good, be it a book, a fishing rod, music, a golf club, a pair of secateurs, the TV, the internet, a bicycle, a bath, a massage, a sex toy
With any combination of the above, and a little imagination, anyone should be able to chill out!