Network Cabling

[NOSPAMnet@xxxxxxxxx]

I presently have an adslnation filtered faceplate on the BT socket in
one bedroom and have my router plugged in to that and my PC connects
wirelessly to it ...I have a cordless base phone plugged in to it as
well and a couple other cordless phones elsewhere around my flat . I'm
not all that impressed with wireless,possible because this is an old
building with thick brick walls  and was intending installing Cat 5
cable ,while some boards are still up. 
I'm assuming that it's basically a case of getting enough cable( or a
made up length and removing the plug(s) ) and enough Cat 5 sockets (
I'm only thinking of one in bedroom and other in living room as these
are only likely places I'll have a computer) and connecting from the
BT socket to the first box then on to the second and bobs your uncle
or is there a better way of doing it .The router has several Ethernet
connections on the back of it .
Stuart