Give me 3 ideas for an instant serotonin boost.

If you want an instant boost of serotonin, try the following things: 
1. Work in a few minutes of exercise, even a short walk can help boost your mood. 
2. Take yourself out for your favorite treat, whether it's a meal at your favorite restaurant, going to your favorite coffee shop, or picking up your favorite ice cream.
3. Think of a happy memory and remember the events of that day.