If you haven’t seen them yet, there are some discussions about meditation on the site: https://forum.artofmemory.com/search?q=meditation
Edit: see also meditation
Silva Mind Control was discussed in these threads:
- Visualization (Silva Mind Control Method Of Mental Dynamics) - #2 by Josh
- Do claimed mind transforming techniques actually work? - #3 by Josh
Further reading: Silva Method
I think some kinds of meditation could be useful, but the Silva Method doesn’t look credible.