What does it mean to fear God?

Fear is a widespread condition all over the world. People fear all kinds of things, from spiders to tomorrows.
This kind of fear is a spirit from the devil, and Jesus told his followers time and time again to "fear not!".
(For more on this kind of fear, please see my list of earlier entries.)
However, there is one kind of fear that is appropriate and well pleasing in the sight of God, and that is the fear of the Lord.
In Psalm 33:18-21 the Bible tells us:
"But the eyes of the LORD are on those who fear him, on those whose hope is in his unfailing love, to deliver them from death and keep them alive in famine. We wait in hope for the LORD; he is our help and our shield. In him our hearts rejoice, for we trust in his holy name." God's eyes are on them that fear the Lord, and He delivers them from death and keeps them alive in famine. What does it mean to "fear the Lord" in this respect? The Scriptures above explains it very clearly; "...those whose hope is in his unfailing love ...".
To fear the Lord means to have such respect and reverence for Him that we trust in His Word 100 % to keep us in all kinds of difficulties and seemingly impossible situations. To put it very simply: To fear the Lord is to trust in His love. That kind of fear is good in the sight of God.

Who is a good Christian?

I guess you have asked that question a couple or more times in your life. "Am I really a good Christian?" "Who is a good Christian anyway?"
How do you measure "good" Christians? I am sure many people would answer: "By their works! Their actions or lack of actions is the determining factor. Jesus did MANY good works, and He was a very good Christian!"
Ok. Let's follow that thought. IF good works is the proof that I'm a good Christian, what about a Christian who is multi handicapped, who lies in his or her bed and cannot move a limb. If good works is a sign of being a good Christian, such a person can never (unless he or she is healed) be a good Christian. And since the Bible does not exclude anyone from being a good Christian, there must be something else that counts.
Jesus said in Matthew 12:33:
"Make the tree good, and its fruit good; or make the tree bad, and its fruit bad; for by its fruit you will get knowledge of the tree." (My emphasis).
There is something the Bible holds higher than works (even though good works are highly esteemed and of high value), and that is fruit. What is "fruit" in this respect? The Bible answers that question in Galatians 5:22-23:"But the fruit of the Spirit is love, joy, peace, a quiet mind, kind acts, well-doing, faith, Gentle behaviour, control over desires: against such there is no law." 
Isn't that great? "Fruit" includes everyone. You can love someone if you're well or if you're sick and bedridden. You can have faith no matter what your circumstances are. On the other hand, being angry, bitter and resentful is not bearing good fruit, and if you harbor these feelings, the law is against you, according to the Scripture above.
Who is a good Christian? The person who bears good fruit!
Does that mean we should not do good works? No, absolutely not, but doing good works does not make us good Christians. Evil people and people of no faith can do good deeds if they want to, but that doesn't make them good people.
How does fruit grow? By being attached to the tree, getting nutrients and water from the tree, and staying there till the fruit is ripe.
Jesus is the tree, we are the branches. When we stay in Him and get nutrients and water (the Word) from Him through reading the Bible and listening to good teaching, we grow fruit. Then we'll become good Christians.