Spending an hour in church every week will not get you to heaven. You have to put your trust in him and put your life in His hands, let him take control and recognize you can't get though everything in your life by your own doing. I the same way, doing good deeds alone will not get you in to heaven. I know everyone here has sinned, even 1 sin will make you ineligible for heaven without putting your faith in God and realizing he died on the cross to save you. Lying is a sin, no matter how minor, it's still a sin. I'm sure everyone has lied at least once, I know I have lied quite a few times, even though I hate admitting it. So if you have lied, you have sinned, which makes you ineligible to go to heaven without God.
If you have accepted Christ in your life, you can sin and God will forgive you of that sin. However, this doesn't mean God likes you to sin. He is very sad when you sin. When you are a Christian God actually gives you the desire to do what is right. I go to public school and have to deal with constant temptations and trials, I would have given in had God not been in my life.