From Margaret Talev in London...

Barack Obama had something of a time-management discussion with Conservative Party Leader David Cameron Saturday in Cameron's London office.  Cameron had been urging Obama to head for the beach -- Obama said he'd take a week off in August -- when the Democratic candidate began talking about time management and decision-making.

He noted that a former staffer to President Clinton told him that "the most important thing you need to do is to have big chunks of time during the day when all you're doing is thinking, and the biggest mistake that a lot of these folks make is just feeling as if you have to be..." Cameron interrupted at this point but Obama picked it back up.

"And you start making mistakes or you lose the big picture... And the truth is that we've got a bunch of smart people... who know ten times more than we do about the specifics of the topic and so if what you're trying to do is micromanage and solve everything then you end up being a dilettante but you have to have enough knowledge to make good judgments about the choices that are presented to you."

Cameron gave Obama a copy of Winston Churchill's History of the English-Speaking Peoples and a box of CDS of British bands -- such as the Smiths, Radiohead and the Gorillaz.  Later he was asked by U.S. reporters if Obama could win an election in Great Britain.  "Oh, I think he would probably beat me," said Cameron.

Later, on the campaign plane heading home, Obama was asked about a bracelet he'd worn in Iraq.  He said it was given to him by Iraqi Maj. Gen. Abdul Aziz, and was of the type that Aziz's troops wear.  "I wore it briefly just to tell him I was in solidarity," Obama said.