Everyone says having a sister is like having a best friend for life — no matter how many small quarrels you've had, you can't help but run to her whenever you have good or bad news to share. Getting her a thoughtful gift for any occasion would show her how much you love and appreciate her. However, since no two sisters have similar tastes, we have compiled a list of the 10 greatest gifts for sisters from jewelry that she can wear every day to personalized picks that will truly show her how unique she is.