To create a starburst effect, set the aperture to f16 or f22. Wait till the sun is just peeping out. The pattern of the starburst depends on the lens in use.
The other useful tip was getting the white balance right while shooting in a rainforest. I recall several years ago I tried all sorts of ways to get the white balance right in the camera. I even used an Expodisc to try and calibrate the white balance setting, but was not successful. The right way is to use a polarizer and turn it until the setting is right. Images below are without and with polarizer.