The forum needs to do a sticky for filters in the future, but the opinions are so varied, it's hard to explain to newbies.
There is a reason why some filters are cheap and others are expensive. I had several inexpensive Canon filters when I started years ago. They didn't do much for the images. I came onto the forum and realized that Ritz Camera wasn't the end all. My brother, who is a pro, never told me about B&H and all the other great on-line camera shops, including Amazon. I found out there were thousands of choices out there for everything and I read all the threads about filters before getting the UV and CP filters. I buy mainly Hoya and B+W, as they are in the mid-range, and have good reviews. Hoya filters are good, but they are more difficult to clean. B+W are more expensive, but easy to clean. If you need a filter, don't think about getting the cheapest one out there. If you are going to put something in front of your lens, make it something worth the money and can actually improve your shot.