Remember, you will be presenting ideas that might be outside of "normal." This is just something to remember when you're engaging with other people, especially in terms of business relations. Sometimes the ideas from outside of the box aren't actually the right way to go.
It's also good to keep in mind that your ideas aren't always going to work. That's okay! It's a part of the learning process and it's why you consider the worst case scenario when you're coming up with an idea.
Be willing to explore things that are out of your comfort zone. It's refreshing and you can find new interests and meet new people.
Read something that isn't your usual genre. For example, if you think you hate crime fiction, why not try reading one? You might be pleasantly surprised; even if not, you've challenged your thinking processes.