But if I am going to cheat and have more, I would:
Ban greenfield development, bring disused houses out of disuse, and have sticks and carrots to bring holiday lets and second homes back into residential
Reform primary healthcare - many people don't need to see a GP but they need to see someone - the answer may be to have drop in centres attached to GP surgeries where you can just turn up and wait to be seen
Merge employee NI and income tax, increase income tax and make tax simpler - the tax take would be greater
Retain inheritance tax - you don't have to pay it, it's only because people hoard wealth instead of spending it earlier in their lives. Spend and enjoy your money and there will be no, or much less, tax to pay.
Extend a ULEZ type charge to SUVs regardless of age and type of fuel and invest in cycling and walking infrastructure rather than new roads
Strict controls on dogs and have dog exercise areas, dogs to be on short leads everywhere else
Reform jail sentences so the only people who go to jail are those who pose a danger; everyone else to be punished in other ways. At the moment we have too many people in jail who shouldn't be there, but there aren't any votes in making life better for criminals
Rejoin the EU (ducks)