Even this matters: with the economy currently close to zero growth (second-quarter GDP figures will be released on July 25th) tiny changes make a big difference to headlines and political fortunes.

ECONOMIST: The economic impact of the games

But everyone is going to see that these small changes can make a big difference.

WHITEHOUSE: First Lady Michelle Obama Unveils Lets Move! Child Care

Here are seven small changes that make a big impact.

FORBES: Women's Top Money Fears And Seven Steps To Overcome Them

Small changes can make a big difference.

UNESCO: Social and Human Sciences

But he did not cause the bust, and he deserves more credit than he is getting for steering America clear of a much worse fate, especially considering the constraints of a political system designed to make big changes difficult.

ECONOMIST: The mid-terms

Ministers decided not to make big changes to the budget after a committee of AMs expressed reservations about whether their plans were affordable.

BBC: Welsh budget passed after Labour deal with Plaid Cymru

It's not a done deal just yet, but Bloomberg is reporting that Google could be about to make some big changes to the way it does business with Google Wallet.

ENGADGET: Google reportedly rethinking Google Wallet strategy, may share revenue with carriers

Simple changes made now, like raising the retirement age by just a year, could make a big difference over time.

NPR: Study: States Must Fill $1 Trillion Pension Gap