I respect this group's input: New to cabling : - Running cables from attic down walls

Hello, my computer office is dangerously hot with 1 server and 6
workstations that all run 24*7, To cool them, I need to place
workstations in various other remote rooms throughout the house. I
would like to run CAT6 cables from an 8 port Gigabit router, out the
office wall.

My plan is to run 4 - CAT6 STP Cables (all less than 100 feet) straight
up the wall , across the attic and then down the walls of 4 separate
rooms to socket plates. I understand everything about crimping, color
coding, and attaching the wires. I know how to test the connections.

However I have no idea how to get from a point in the attic straight
down to where I want the connector panels to be. How do I find the
spot? GPS? (Joke) I don't know how to drill down at the right spot and
drop the wire so I can find it at the hole where the connector plate
will be, and pull it out the wall

I would also like to avoid drilling into plumbing pvc pipes, 110 volt
wiring, or similar things that would kill me in the process - or later
by creating an electrical fire one night. I can't find a good site on
the subject of dropping the wire at the right spot and knowing I am
safely drilling and avoiding damage to electrical or plumbing wires.

Can anyone suggest a site with detailed instructions, pictures or
diagrams? Perhaps a good book? I need to learn how to do this and
exactly what tools I need to guide the wires down. Judging from the
posts this is the crowd that is best suited to offer me advice that I
trust.

If you have any links, book titles, or ideas please let me know. I
would be much in your debt.

Lost with a powerdrill in the dark.
Bryan E.

.