Dream board is indeed a new term (also called a Vision board). That's why the author put it in quotes, to warn readers that they might need to figure out exactly what it meant. But the words are pretty transparent - it's just a creative, inspiring picture/text "collage" of all the things that are important to you now, and more particularly your aspirations for the future.
I assume the principle is that by creating one you're forced to think consciously and coherently about your "life plan". And once you've got it, you can keep looking at it to remind yourself what you want and how you're supposed to get it. One-on-one lifestyle coaches/personal trainers have routinely incorporated the technique into their work, but I don't think either of those two terms were normally used (if at all) until a few years ago.
It looks like a rapidly-growing internet phenomenon that in many cases is really just scamming - in most cases you won't be getting any personalised guidance at all. I haven't looked in any depth, but from a brief scan there are plenty of people trying to make money out of persuading others that this sort of thing will turn their unsatisfying lives around.
Most people's lives are no more likely to be turned around by getting involved in "dream boarding" than by buying a lottery ticket - you're usually being sold the chance to dream, not something that will actually realise your dream. IMHO in a few years time it'll be looked on much as we currently see pyramid selling. A few get lucky - but most will be at best disappointed, at worst exploited.
At the linguistic level (this is ELU, after all) I would guess that dream board is somehow more appealing to gullible people. Vision boards don't have quite the same sense of fairies waving magic wands and giving you your heart's desire. Competent qualified therapists would probably call them Mind Maps or Goal Maps, and draw on a wealth of skills to help you create one if they thought it would be effective in your particular case.
In my opinion, the adverb enough used in this sense creates a conversational rapport between the speaker/writer and listener/reader. In strangely enough, interestingly enough etc., the enough might mean "enough to go so far as to consider it such". The reason it's used is perhaps a fear that the addressee might not feel the described circumstances really warrant the qualification strangely/interestingly/etc. By using it, the speaker/writer acknowledges that their listener/reader is right to think that, but that the circumstances really can be considered such for the sake of their conversation.
In any case, this enough is not used in a formal register. When it is used in a formal setting, it signals a (temporary) lowering of the register.
Just my two cents.
Best Answer
I think of "mind you" as meaning something very like "on the other hand". It introduces a new idea related to the main topic, often a contradiction or counter-example.
Teenagers today are terribly rude. Mind you, I was probably just as bad when I was that age.