I would have the decoraters in and have every room in the housem except the bathroom, done up.
The bathroom would be completely re-built, enlarged, have both a walk-in shower and a bath-tub installed.
New windows with the latest energy saving technology and new outer doors next on the list.
After that, if there was still money left - front garden dug up and paved with small beds containing flowering bushes and one or two tubs of flowers. Garrage drive paved as well, sot that deliveries of logs etc. can be wheeled all the way up to the wood-pile.
But I shan't do any of all this, as I never buy lottery tickets!