Oooh, well done and congratulations, and remember we WANT PICS!!!!
Check what food your dog is currently on, and if possible feed the same for at least a while, while they settle in. helps minimise disruption and upset tummies, which are very common when moving to new home.
Find local vet, get him registered, and get vet phone number programmed into your mobile. Make sure vaccinations, worming etc are written on your calendar. Get tag made for his collar.
Get him insured from Day 1 - absolutely vital.
Find good local training classes and sign yourselves up to do at least a basic course, somehting like KC Good Citizen Bronze Award is perfect.
Think about travelling, if you have a car, consider how/where you will be transporting dog, and if necessary fit dog guard, get dog safety belt or appropriate cage etc.
Discuss with ALL family members and agree on consistent and clear behaviour rules and boundaries e.g. whether allowed on furniture, not giving food scraps etc. Make sure all family members are briefed on the importance of closing doors/gates etc to prevent escape.
Buy poo bags (lots!), water bowl, food bowl, collar and lead (not extending), dog bed, brush, training treats, and food.
Good luck!! 