Oh I'd have to go with mind control. Mass hypnosis or possibly magic, depending how probably you find magic to be.
I figure that everyone just waking up and deciding that I should be in charge of absolutely everything, and utterly above criticism or reproach would make everything so much better than ruling through violence or fear.
With the fear route, you always are worrying about getting backstabbed and what not, and in the end the paranoia means that while you are in charge, you are still in your own self-built jail of terror. With the making everyone love me route, I can knock off all the hot chicks without any concerns and actually not have to be a dick all the time. Just chill out and leave most of the running to the beurocracy and just tell them what exactly we're trying to sort out.
Basically, its my dream world where there is free love, I can immediately impart my will on everyone but don't have to if I can't be bothered and generally can just lay around making the world better. Oh and the chicks. I think my forth decree would be legislating stripperific outfits for those under 25.
Edit -
If your curious, my first three decrees would be:
1. Drawing a line across the country at watford gap services, declaring everything north of it to be a labour camp, and exporting everyone I consider to be too dumb to live to above it, then cutting off the power and letting them battle royale it out.
2. Legalising drugs
3. Banning neckbeards, emo clothing on men and everything that is hipster in nature, on pain of being fed to scorpians.