that the Bookers/PO's directions are about 90% of the time pretty good.
The other 10% is when it can get pretty fucked up! On top of that they want you to be discrete and blend in, so with bad info it can be challenging.
As far as tricks, IMO, after the first time is when they should kick in!
But first time visiting, without an earlier recon, you have to read the signs, room #'s, that are posted on the walls.
Now, you should read them while you walk past them to get to your destination quickly and discreetly.
Might not be too cool standing there and staring at them and trying to figure them out!
Also, once read you might have to figure out if the numbers are in sequence or staggered or just what the layout is.
All on the move is best, like you know where you're going!
Once I get to a new place, I'm always checking other ways in and out and just the layout of the building and neighborhood too!