Imagine you are lying on a big grassy hill.
Feel the grass underneath your feet.
How would the sun feel shining on your face?
Imagine the feeling of a soft breeze.
Listen to the sounds of birds around you.
There is nothing else.
Just you, the hill, and the open sky.

Now, imagine that each thought you notice is a cloud passing overhead. 
Notice each thought as it comes up and watch it just as you would watch a cloud passing on a sunny day.
You are not trying to do anything about it, not worrying about it or trying to change it; just observing it with a smile. 

You will begin to notice more thoughts arising. 
Do not do anything about these either. 
Just watch them come into your sky and then gently float away.
Breathing in, breathing out.