Always use manual control. Never use the auto exposure thing. Also, get in the habit of using manual focus. Usually AF sucks with most low end lenses.
There are endless things I could type, but a few tips are to keep your ISO as low as possible. It shouldn't be a problem keeping it at 100 when you are on the hill (unless its overcast). Try to keep your shutter speed at least double your frame rate. If you are shooting 720 @ 60fps, then you are gonna want to be at least a shutter speed of 120. I prefer 250 almost all of the time. You will see that different shutter speeds will give different looks, but try to keep it constant throughout an edit. Lenses are usually sharpest around f5.6-f11. The sweet spot is usually anywhere from f6.3 to f8. Try to stay in that target range. Try to never shoot wide open (the lowest number aperture on your lens) because your image will not be as sharp as if it were around f6.3. Get a ND filter for when shooting on hill. They act as "sunglasses", if you dont have one, then you are going to have to jack up your shutter speed or aperture, which you dont want.
A good beginner lens is a tamron 17-50. Also, get a fast 50mm. Canon sells their 50mm f1.8 for around 100 bucks. Its a great lens for the price. If you have 400 bucks to spend, get the 17-50 used and a 50mm f.1.8. That will defiantly be substantial for your first season with the camera.
You need a tripod with a DSLR. If you dont have some sort of stabilization, your image will look not so good. Look at manfrotto 701 head with 055 XB legs.
Also, if you have not done so already, read through your manual and know your camera inside out.