1. Go out and talk to a stranger. Write down your interaction later. Take notes of your body language. You goal is to have them ask for your number or email before the conversation ends.
2. Learn something you have never learned before and device a way to practice it every day. (You don't have to do it of course.) This is practicing your meta-practice skills.
3. Teach/explain something you know very well to someone who doesn't know anything about it.
4. Pick something randomly (daily utilities or routines), and make it better, or at least think about how you would do it. (You want to focus on a specific quality for at least a week. e.g. this week is user-friendly week, next week is durability.)
5. Find something (or concept, habit) you don't need and get rid of it.
6. Grab a friend/stranger, ask about something he want to change about his life. Analyze it and find the root cause. (of course, solution will be even better)
7. Grab a friend, tell them about something your want to change. Analyze it and find the root cause.
8. Meditation (the sitting kind, but also try to be aware of your thoughts at all time of the day.)
9. Make 10 people laugh.
10. Pick a newspaper/blog article and rewrite it.
11. Smile at everyone you see, and find something about them that you like.
I can keep going with the list.
The principle here is what you already know, which is putting in 10,000 hours.
However, I think it's far important to focus on the specific and push yourself just a little bit every day.
You don't get better at playing chess by playing in the same rank for 10,000 hours. You get better by playing with someone who's better than you until you can beat him consistently, then play with someone who's even better until you can beat him.
This works because your brain is design to adapt to harder and harder tasks. Hence the old saying, "if it's not hard, you're not learning."