When I go to a job I ask how many sockets and where they are to go. 9/10 haven't a clue! [Linked Image] And for those that 'specify' I usually overrule half of them as being unsafe/OTT/hellish to fit! [Linked Image]

In most houses, unless told otherwise, I put: (All doubles; 1 = 2 outlets )

Hall - 1 + 1 by a phone table
Lounge - 2 @ TV location and 1 or 2 on each wall
Dining 3 to 4
Kitchen - F/spurs to all fixed appliances ( above counter ) with single u/s sockets behind appliance. Then 3 to 'loads' depending on size of room [Linked Image]
Utility - same as kitchen but not so many extras
Bedrooms - 1 per person next to bed/s and 1 or 2 on other walls depending on size
Landing - usually 1 hoover point
I also try to fit RCD protected weatherproofs outside to prevent unprotected extensions being used to power stuf in the garden. Garages are always wired with RCD protection - and preferably outdoor accessories depending on their location.

I always fit more sockets than immediately needed; for the small cost it could save a lot of heartache in the future [Linked Image]

If hindsight were foresight, we'd all be millionaires!