Man of the match Jos Buttler was looking forward to the Champions Trophy after helping England to victory in yesterday's third one-day international.
Buttler was named man of the match after his 47 from 16 balls gave the hosts late momentum which helped them to 287 for six at Trent Bridge.
New Zealand could only manage 253 in reply, giving Alastair Cook's side a 34-run success which reduced the NatWest Series deficit to 2-1.
Somerset player Buttler said: ''It was a good opportunity, with a licence to go out and express myself at the end of the innings.
''We got a good score in the end and defended it well, and it's nice to contribute to a winning performance. Hopefully there are many more to come.
''It's great to have the Champions Trophy in England and everyone is very much looking forward to it.''
Cook said: ''At the beginning of the day, a win was very important and I thought we played very well. Jos was the difference between the sides.
''We haven't quite got it right in this series, we've been fairly close getting ourselves into positions and letting it slip with the bat or ball, but we're almost there.
''If you are not there 100 per cent you get beaten easily, as we were in the first two games.''
Asked whether two spinners was an option in the Champions Trophy following James Tredwell and Joe Root's contribution in today's match, Cook added: ''Two spinners is a thought.
''We are lucky to have two very different spinners, so they could play together.''
New Zealand captain Brendon McCullum said: ''I thought today we were good for the majority of the day but Jos Buttler's innings was world class and to concede 76 off four overs - you've got to acknowledge some excellent batting (by England).
''But otherwise our performance was very good and showed if we can execute our plans accordingly we are a very good side.
''We possess some destructive players but with new rules it can be hard to defend at times. We played reasonably well but England deserved their win today.''
McCullum said the Black Caps were also looking forward to the Champions Trophy, where England are among their group rivals.
He added: ''To win this series is nice but we know England are a dangerous outfit and we've got to continue our form.
''We've got a couple of weary bodies but hopefully with a couple of days off now we'll have a fully fit team.''
Player of the series Martin Guptill, who scored 330 runs for the Black Caps in the series, said: ''Today didn't go quite as planned but we're happy with the series win.
''It gives us a bit of confidence and momentum ahead of the Champions Trophy, which we're looking forward to.''
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