1. Listen to your kids. Let them tell you about their dreams and what interests and excites them.
2. Make the most of opportunities. Don't sign your kid up for every sport and activity under the sun. Choose the ones that match their interests. That way they can see if they like something enough to pursue it more and don't get worn down and stressed out from being over-scheduled.
3. Let them try new things without making a huge long term commitment. Sign up for a 4-6 week class or join a club at school - low pressure ways of finding what they like and are good at.
4. Take advantage of the local library. I go once a week and check out books for my kids based on their interests or things they've asked about. Thanks to the library, my 14 year old son now has a big interest in particle physics!
5. Love them. All the time, no matter how well (or poorly) they do academically or athletically or artistically. Be their safe place, where they aren't judged by how they perform, but are loved because they are your child.