[waserwill]

This is maybe similar to some Jewish equivalents to mediation. The focus is ultimately on better action (the concept of commandments places an emphasis on doing over having the correct mindset or beliefs). These forms of meditation range from contemplative (of the characteristics of G-d, mystical concepts, etc.) to self improving (e.g. going out alone in nature and just saying to G-d whatever comes to mind, or visualizing what one learned to engage again in the topic, for understanding or building virtues). Jewish prayer and study can also be meditative, and can be either communal or secluded, verbalized or silent. [0] [1]

There are certainly parallels in other Western traditions, particularly in Sufism [2] [3]. Personally, I think that the most effective form would be the one closest to a person's tradition; ideally, meditation is a practice that's embedded in a wider setting (of legends, language, ideas).

Some more info: [0] https://en.wikipedia.org/wiki/Hitbodedut [1] https://en.wikipedia.org/wiki/Jewish_meditation [2] https://en.wikipedia.org/wiki/Muraqabah [3] https://en.wikipedia.org/wiki/Hesychasm