Sometimes, counter-intuitively, it's easier to make a major change than a minor change. When a habit is changing very gradually, we may lose interest, give way under stress, or dismiss the change as insignificant. There's an excitement and an energy that comes from a big transformation, and that helps to create a habit.

I have a lucky perfume. I love beautiful smells, but I save one of my favorite perfumes to wear only when I feel like I need some extra luck.

I'm a creature of routine, and I hate feeling incompetent, so I avoided novelty and challenge. Making an effort to push myself in that way has brought me surprising boost.

I've found that I snack less and concentrate better when I chew on a plastic stirrer - the kind that you get to stir your to-go coffee. I picked up this habit from my husband, who loves to chew on things. His favorite chew-toy is a plastic pen top, and gnawed pen tops and little bits of plastic litter our apartment.

One of the best ways to make yourself happy in the present is to recall happy times from the past. Photos are a great memory-prompt, and because we tend to take photos of happy occasions, they weight our memories to the good.

I am living my real life, this is it. Now is now, and if I waited to be happier, waited to have fun, waited to do the things that I know I ought to do, I might never get the chance.

Feelings follow actions. If I'm feeling low, I deliberately act cheery, and I find myself actually feeling happier. If I'm feeling angry at someone, I do something thoughtful for her and my feelings toward her soften. This strategy is uncannily effective.