Should I meditate on one thing or just any sensation that arise? As I research I am hearing people say pick a single point and focus on that. Then I hear other say you should just focus on the sensation that arise in your body. Personal one point focusing is much easier and I often get distract on if I should focusing only on the breath or move it to the inch on my leg or the numbness from sitting. Most people from the east that I hear say single point focusing more western meditator that hear say focusing on different sensation. Which is it?
The main objective of meditation is to maintain a mind of equanimity (calmness). 

When the mind is calm, it can also develop insight. 

Meditating upon one thing helps establish equanimity (calmness). 

The main practise in the teachings of the Buddha is to establish the mind on knowing when the body breathes in &amp; when the body breathes out. 

In does not matter where this knowing of breathing in &amp; breathing out is established. 

The knowing can be in a small area, such as the nostrils, nose-tip &amp; upper lip. 

Or the knowing can be in a larger area, such as the abdomen; or even a larger area, from the nostrils, throat, chest to abdomen (stomach).