we don't watch much TV at our house, like a good movie every now and then, deadliest catch, dirty jobs, and a few (very few) other shows. but i feel we have done ourselves and society a great injustice by allowing all types of behaivor into our lives thru the electronic baby-sitter, it has/is happening very, very, slowly, if you get the chance read the book "the marketing of evil" a real eye opener in how things have degraded, who is responsible, and why they want you to "accept" their way of thinking
bottom line, if its daylight get outside, at night read. i mean on most sitcoms have laugh tracks so you'll "understand" what is funny and know when to laugh
another sure fire indicator if its not appropriate, watch it with you mom, sister, dad, or girlfriend, if it makes you uncomfortable its probably best to turn it off

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do things that feed your mind
http://www.jesus-is-savior.com/Believer's%20Corner/if_my_people.htm