The former F1 world champion had a turbulent season last year and although Hamilton won three races, he also had a number of incidents and was outscored by his McLaren companion Jenson Button.
Hamilton had made conscious efforts to reduce the level of 'baggage' in his life and develop better communication with his engineers this year.
The McLaren driver said: "Every year you finish the season and you try to analyse what you've been through and what you've done and try to take away the positives from what you've done. Then you try to channel those and then improve on the things that you didn't do so well. I've always said it's a combination not just of things you do at the track, but it's your personal life out there, time at home, time with friends, those sort of things.I've strengthened bridges and relationships with people, not only in my personal life but also in my team. I've been working with the engineers better this year and all of that stuff has just helped. I don't have any particular problems going on in my life, or any baggage and last year I had a big, big sack. Fortunately I've dumped that in the dumpster and it's all good now."
Hamilton is currently fourth in the championship, 47 points behind Championship leader Fernando Alonso.