This is all sound advice.

The researcher profiled in the article has a wiki associated with his book, with a manual for creating ideal tripping situations. It looks like it's probably taken straight from the book, perhaps with some light editing since it's on a wiki.

I also recommend reading some trip reports over on Erowid. (These are also great for curious bystanders who don't feel they need first-hand experience.) Knowing how people's trips can vary, sometimes widely, can avoid the trap of thinking something terrible and dangerous is happening in your own if things don't seem to be going the direction you expected.

While I'm at it, I might as well throw in a link to the last chapter of Hoffman's book, "LSD: My Problem Child", where he talks about what he learned from acid.

I am often asked what has made the deepest impression upon me in my LSD experiments, and whether I have arrived at new understandings through these experiences.

One real neurological danger of LSD is Hallucinogen persisting perception disorder (HPPD). Uncommon, but rather undesirable and not well-understood.