No expert, but...
OK, the difference between subliminal manipulation and PR is that, in PR, you have a clear intention for your suggestible state - and you know that you are in an altered state of mind.
First, your intention should act as a filter.
Second, your knowing of your state will be a defense too.
And you can actively defend yourself against manipulation: Choose a time and place "where you are reletively free from distractions" (Paul Scheele). Oh, and you could instruct yourself to only accept positive input or even create a detailed list of things not to notice.
But, my personal view: Since we all are steadily manipulated I don't think the PR-time will make a great difference.
Just be aware of yourself, your thoughts and actions, or, to put in in the way of LSC and Natural Brillance: Release - Notice - Respond - Witness.
Jens
