The perfect Scripture.

Ephesians 4:29
Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.

1 Peter 3:10
For he that will love life, and see good days, let him refrain his tongue from evil, and his lips that they speak no guile:

James 3:9-12 (Amplified Bible)
9 With it we bless the Lord and Father, and with it we curse men who were made in God's likeness!
10 Out of the same mouth come forth blessing and cursing. These things, my brethren, ought not to be so.
11 Does a fountain send forth [simultaneously] from the same opening fresh water and bitter?
12 Can a fig tree, my brethren, bear olives, or a grapevine figs? Neither can a salt spring furnish fresh water.


I can tell you from experience that secular movies, tv shows and music can easily affect what is in your heart and mind (thoughts). Journalgirl is right. Try and keep trying to refrain from watching certain secular movies and shows that have such evil in them (cursing, nudity, etc). Same with music. Not all shows are horrible even though secular, but to find such decent shows to enjoy a little entertainment is not going to be easy.

For me, as for TV shows I love 80's, early 90's shows like Family Matters and The Cosby Show. Those two are fair to call family friendly shows (in my personal view anyway).