But whether or not your sister likes the book, it may give her joy to think about you thinking of her.

WSJ: Dan Ariely, Author of Predictably Irrational, on Holiday Gifts

You grow up seeing your older brother or sister taking part in track and field, sprinting, and you get motivated by that.

NPR: Jamaicans Revel In 100M Olympic Triumphs

But these symptoms may differ for your wife, mother or sister because women do not always experience the same heart attack symptoms as men.

CNN: Heart attacks: What you should know

Instead of picking a book from your sister's Amazon wish list, or giving her what you think she should read, go to a bookstore and try to think like her.

WSJ: Dan Ariely, Author of Predictably Irrational, on Holiday Gifts

Thing is, for us (and likely many of you), they last far longer than our clinically-diagnosed Gadget Attention Deficit Disorder would ever tolerate -- but for your dad, your sister, your college buddy with the hand-me-down ZEOS Pantera running Windows 95, or anyone weary of re-upping a two-year commitment, a handset can easily become a serious long-term investment.

ENGADGET: Nielsen stats: a lot of iPhones out there, but also a lot of everything else

And your sister-in-law, your golf buddy or your business partner is touting a "your CPA probably doesn't know this, but" way to pay less.

FORBES: Magazine Article

The dependent must be your child, stepchild, adopted child, foster child, brother or sister, or a descendant of one of these.

FORBES: Bringing Up Baby: Moms, Kids and Taxes

Your sacrifices were always made for the benefit of me, my sister, or Mom.

FORBES: Dear Dad, With Love