Rootbeard,
Instead of thinking of the Sun as your enemy, use it as much as possible.
The secret to flying against the Sun is to never look directly at it. The "blinding thing" only happens if you are focused directly at it.
Now, those two probably sound irreconcilable but, in reality, they're not.
If you know the sun is going to be right downwind use it as reference for your maneuvers by always flying just to one side of it or the other depending on the maneuver. If you're doing inside rounds, for instance, make sure it is always in exactly the same location in relation to the airplane every time you pass by it.It's a lot easier than using a ground based reference for intersections, for instance. There's never any question where the Sun is so just always fly by it in the same spot every time. If you're watching the airplane, by definition, you won't then be looking directly at the Sun and frying your retinas.
The one time you can't plan doing this in advance is when you start the wingover on the opposite side of the circle. In this case you need to plan well in advance of take off where you are going to start your wingover so that the descending arc will pass to one side or the other of the sun. This isn't ideal since, if the wind is blowing to any degree, you might have to accept a less than ideal point to climb. Now it become a matter of judgement. Is the risk of getting blinded on the descent greater than the risk of doing the wingover slightly off the wind.
Here's another hint. Check out the inclination of the Sun on a given day when you go flying and if its going to be around 45 degrees or so you can pray for a wind blowing at the Sun because it'll give you a real good gauge as to the accuracy of the tops of your maneuvers.
The last bit of "always good" info is to "never" look directly at the Sun. Again, it is only this direct frying of the eyeball that produces the temporary blindness.
Now, the only caveat to the above is that to make this work for you, you've got to know how to make the airplane go where you want it to go. Even this isn't all bad. Making all of your loops pass in exactly the same place relative to the Sun will pay big bonuses in teaching you how to make it go where you want it to go. It's like a road sign.
Ted