In the last five years, what new belief, behaviour, or habit has most improved your life?

Finding gratitude and appreciation is key to resilience. People who take the time to list things they are grateful for are happier and healthier. It turns out that counting your blessings can actually increase your blessings. My New Year's resolution this year is to write down three moments of joy before I go to bed each night. This simple practice has changed my life. Because no matter what happens each day, I go to sleep thinking of something cheerful.

I just finished reading BJ Fogg's new book, Tiny Habits: The Small Changes That Change Everything. Fogg explains that the best way to build a new habit is to start small and succeed, rather than starting too big and giving up. For example, rather than trying to exercise for 30 minutes a day, he recommends aspiring to do just one push-up, and doing it consistently. This approach may be helpful to those of you who want to spend more time studying. If you hold yourself accountable for watching, say, 10 seconds of an educational video every day — and you do so consistently — the habit of studying daily will grow naturally.

It took me a while to realize that the internet would be the single best way to make technology accessible to more people. As soon as I did, I changed course and decided to pursue my dreams at Google.