Actually you got TWO, if i remember correctly
Keep working his challenges, don't throw random Super/Ultra-Hadous unless you have no choice and ur almost dead (look who's talking random...lolz), and work on canceling a Dragon Punch into a Super-Hadou, Ultra-Hadou or even another Dragon Punch, ...even though Ryu's U2, Mettsu Shoryuken/Shin Shoryuken is much more effective and damaging IMO, then you will have U1 to use on people you can zone and U2 for characters who need to be knocked out of the air often. If you do the SRK-motion to a grounded opponent and it connects, before the animation is over, if you press MK+MP and hold it while you do a dash, you can cancel it and juggle a floating opponent into another move/special/Super/Ultra. It's not easy to do IMO, so take some time a learn to do it. I'm still learning myself