I'm 17 and I'm working 3 jobs at the moment. I would have to say my favorite job is working in the stables. I work there most weekends for 5 hours from 6am then i get to do my own thing. Sure I wake up early but thats just to do something I love. I get paid $20 for each 1 hour training session and end up having around $160 for working 10 hours. I love training foals and horses, and monitor their progress! It's an amazing to go out to competitions and watch the horses that I trained compete!
I'm also working part time at Donut King selling donuts and as a barista. Great job! You get to socialise with lots of people, and the ability to connect with customers is desirable for future career opportunities. The pay is higher than the standard prescribed pay and extra on weekends. My boss is very flexible with shift schedules so that's never a problem.
And I also work at Valley Girl. They have average pay by great flexible shifts.
But all pay and schedules depend on your employer.
Hope this helped a little