Pretty much as you say, just wire each point back to a central point then you can connect each room to whatever you want.
For the satelite sockets there is no need to have one in every room unless you specifically want a digibox in every room. If you just want the satellite signal to be redistributed round each room then I'd use something like
this. I've used this a few times in the past and it keeps it neat and works well for a basic redistribution from one digibox.
As for the phones, I've used mainly Cat5e cables in my house and this is becoming a more common occurence with the more widespread uptake of home networking. This is quite a bit more expensive than just wiring a few phone points together although it can be used for phone or data services. You would need to run all Cat5e cables back to a central location and terminate them into a patch panel in a cabinet, which is where the expense comes in. If you want to look at swapping over to having a home network in the future you could wire al the phone points with Cat5e cable and use the standard phone sockets and connect up in the same way as you would wiring it with normal CW1308 phone cable. You could then just change the outlets for Cat5e sockets and reterminate the cables into a central cabinet at a later date. If you were to wire them in CW1308 type cable then there is no real need to wire them to a central point, you can just loop from one point to the next originating from the master socket.
As for testing the cables, I have several hundred pounds worth of test equipment for phone, data and TV systems, but I feel that could be a little excessive for yourself. All you really need to do is check to make sure there are no shorts on the co-ax and that the cables are correctly terminated. You could quite easily achieve this with a multimeter. If you went down the Cat5e cabling route you can buy a wiring termination tester for around GBP30-40.