Meditation

Meditation has for centuries been one way people trained their minds. The Buddha suggested four things to consider:
1. Human birth is hard to attain and extremely precious. We must do something of value with the opportunity.
2. All things are impermanent. The body that we are so attached to will soon be a corpse.
3. Karma is an immutable law. The results of our actions will return to us, so we must plant good seeds.
4. Samsara, the world of perpetual desires in which we have been trained to live, creates endless suffering. We must rise above it for our own benefit and the benefit of all beings.

Whether meditating or not, these are good guidelines to consider.