The 30-day trial is a powerful personal growth tool that can help develop new habits. The idea is to try something new for 30 days, which is just about the right amount of time to add or subtract a habit. The author shares some new things he wants to try in the next 30 days, including shooting a new film every day, becoming a vegan, and learning 10 expressions in English and Chinese every day. The article encourages readers to think about something they've always wanted to try and give it a shot for the next 30 days.