Two complementary meditation practices.

Think neither of the past nor the future, do not analyse, initiate or
engage in conversations or fantasies with yourself. Let the body be as
tranquil as a sleeping babe and the mind in its natural state.  When a
thought arises relax more, note it, chop it down, root and all, and
continue meditating. Try by mental alertness to arrest the thought
process so that not even a single idea should arise. 
Through this meditation practice one understands the arising and
passing away of thoughts and emotions. It leads one to freedom from
the tyranny of thought, resembling one who is at rest sitting by a
riverbank watching the river flow past. 

In the next meditation practice be indifferent to the thoughts,
allowing them to do as they please. Do not attempt to prevent them,
nor fall under their spell. Be aware also of the flow of breath
without interfering with it or becoming hypnotised by its rhythm.
Eventually, in meditation, thoughts will cease to arise and the mind
will become one-pointed.