If I leave my house for a short trip, I usually take the following:
Nokia C5
Note 2
Car keys
Car registration papers
Both passports
Wallet with money
Wallet with cards (driver's license, insurance cards, credit cards etc.)
Keys to the house
chapstick
Ballpoint pen
In-ear phones
When going for a longer trip, I take a bag with a charger and cables, my MP3 player, the Note's "headset", some more pens, two decks of cards and a USB storage device or two, and whatever papers I might need.
When I go out cycling, I usually leave the car stuff at home, and instead pack a gel (in case I get unbearably hungry), tire levers, bit of tire and an innertube, and occasionally a full set of allen keys, a rain jacket/wind breaker and the MP3 player.