1. You can never have too many powerpoints
Very important!! Our "allowance" for electrical was something like $3500 (this was in 2002) which allowed for 1 double power point room - hardly realistic. We got our own electrician and ended up spending $11000.
We had a similar issue with flooring - the allocated budget allowed for the cheapest, crappiest carpet that could be found. We ended up having no flooring to start with (installed it gradually between 2004-2006).