Exercise and meditation are the simplest, easiest, and can even be combined. Walking meditation, for example, has been a mainstay for millennia, as has Tai Chi.

Your consciousness improves naturally after enough practice. Simple.

Meditation is a skill that takes practice to develop before you can feel comfortable enough to go into a deep meditation, or deep relaxation. There are many different styles and all of them focus on the breath. A simple thing you can do to get started is to learn proper belly breathing, then meditation come naturally.

If properly done, it's essentially the same as any other kind of true meditation. That is, focusing the mind for long time on a very specific and simple object, being physical or not (even "no object" could be).

It seems that in Buddhist meditation some meditation objects are more frequent. Such is the case of meditation on breathing, on the body parts or on the full body as a whole among others.

A zendo is a meditation hall or room used for Zen Buddhist practice. It is a dedicated space where practitioners gather for seated meditation (zazen) and other Zen rituals and ceremonies. The zendo typically has a simple and serene atmosphere to support focused meditation practice.