Sanyasm/Getty Images Buying and setting up a brand-new TV is always exciting, and modern televisions from major smart TV brands  provide stellar picture clarity for watching movies or gaming. However, the setup process doesn't always go off without a hitch. If you're too hasty about setting up your TV, you may inadvertently fall into one (or more) of the common pitfalls that new TV owners often make. Some mistakes stem from pure carelessness. Others happen because, in your pursuit of the best deal possible on a TV accessory, you've ended up with shoddy hardware. In some cases, the TV's settings themselves may be limiting your viewing experience. By understanding the most common mistakes and faux-pas in the TV setup department, you should be able to get your new device up and running both optimally and without any problems.…