Here goes: I am taking my first trip out west in July. I will be photographing scenery, Indian reservations, and of course all the good stuff like Mt. Rushmore and the Badlands. My dilemma: I only have enough to purchase two necessary things - One of which is a new lens and a tripod that is good quality, but light enough for me to handle when shooting outdoors. Budget is a huge concern, but I want to purchase good quality. This is the equipment I have --
Canon T3, Lenses: 18-55mm Kit Lens, Tamron 75-300mm Standard Telephoto, Canon 50mm lens, 58mm Wide Angle lens and 58mm 2x Telephoto lens. (All came with the kit)

Well, everyone, have at it!!!

Best tips are to practice with it HEAVILY so you instinctively know when it will improve a scene, and when it won't! Know your filter as well or better than you know the lens you will use it on. And don't be afraid to try it on scenes you may not at first think it appropriate for, it can really bring out color saturation in the right situations. The biggest mistake most photographers make is OVER-using the CP. Use it judiciously, but LEARN and enjoy the effects it can give, you have a very good CP there.

You really have to look through the viewfinder and turn the filter until you get the affect you are looking for. There is no right or wrong way. Pay attention to water and sky. To remove glare, watch the water surface as you turn... When the glare disappears, then you are ready to shoot. Likewise with the sky---when the sky turns dark blue, you'll know it.

Also, keep in mind that polarizing filters work best when the sun is at a 90 degree angle from the horizontal plane of your lens. Therefore, if you are looking for the deep blue sky, then you'll want to take shots between 11am and 1pm.

A final tip. It's very hard to see the affects through the viewfinder when you are wearing sun glasses (most have polarizing lenses as well). Of course, during high noon, sun is when you'll want to be wearing them. I usually have to take my sun glasses off to compose a shot. Very annoying.

Here's a shot I took with mine slightly before noon.