Exposure. Exposure is the brightness, and how much light is exposed in the photo. This is a tool that I use on nearly every photo, as I find that my photos look so much brighter and colourful. Do be careful though, there is a thin line between bright, and too bright (personal experience...!)
Colour temperature. I only use this occasionally, but it does look effective when I do! This is basically how warm you want the photo to look, cold or hot. As I said, because I have only used it occasionally, I can't make a judgement either way, but from personal experience it is a good tool to use for your photos.
Angle Editor. I use this to try out different angles on my photo. This is just a bit of fun, and more often than not I get a nice angle that I would have never thought of without playing around with the settings! If you see in the example image, the original is tilted left, but with a bit of editing you can get it closer and tilting right, which I think is a better angle!
Let me know if you try any of these, and do you have any editing tips?