Agree with johnmusacha : first look at the kings!
"single line chess advice"

there are ALWAYS exceptions to rules
It depends on the position
True, but some general "single line chess advice" are true for 90% of the situations. Im looking for advice like that. And then its up to the player to find out when to use them.
- if a (valueable) piece is lined up with the king, look for ways to pin the piece down
I would say about 20 percent of single line is 90 percent corretct. Practically nimzo's whole list belonged to the 80 percent.
The thing is the principles will always be countering each other and you have to figure out which one is most important...
But, the thing is THE ONLY 100% true single line advice is it depends on the SPECIFICS of the position.

I once saw a book by soltis : the wisest things said about chess. It was a full book o these one liners evaluated and documented. Almost bought it but bought another book.

1. Do not move any pawns in the opening of a game but the King and Queen pawns.
I guess he didn't like the flank openings or the fianchetto? I'm sure this is too simple.
Common Sense in Chess was actually a series of 12 lectures given to the members of a (London?) Chess Club, so I think Dr Lasker was giving advice to beginners and amateurs. The book is basically a beginners book as far as I know.

never ask a bunch of clowns for advice!"
Is it OK to ask just one clown?
yes, not quite as bad as asking a bunch!
so you're heading in the right direction Nimz!
Have to say though Nimz! your ones are bloody good!

9) Never go against a Sicilian when death is on the line.
HAHA!!! From "The Princess Bride"

You never play the board, always play the opponent.
(it's not mine, but it's a life phylosophy too)
Don't masters say play the board?

Don't masters say play the board?
Some of them do, but not all of them.
Do you always post your comments in the quote box? :-p
Dr. Emmanuel Lasker's rules for the opening (from Common Sense In Chess)
1. Do not move any pawns in the opening of a game but the King and Queen pawns.
I guess he didn't like the flank openings or the fianchetto? I'm sure this is too simple.