There isn't much you can do CPU wise with an FM2+ board really, the best you're looking at is a 760k, which isn't a huge improvement if I'm honest. Also, that mobo is a bit low quality, so overclocking with your CPU is going to be limited. The PSU may be fine, although I would be wary of it. That CPU cooler is decent though, and the hard drive, while not the best quality, should be fine. What sort of RAM do you have?
Overall, I think it would probably be best if you saved up and got a new build, maybe reusing the hard drive, CPU cooler, and MAYBE the PSU (I will look into seeing how good it really is). If you have 8gb 1600mhz ram, you could reuse that too.