Well, I am a Christian. It's obvious, given my wallpaper. If you ever want to be a Christian as well, this is how to do it:
1) Realize God loves you.
"For God so loved the world that He gave His only begotten Son, that whosoever believeth in Him shall not perish, but have everlasting life."
2) Realize EVERYONE is a sinner
"For all have sinned and fallen short of the glory of God."
3) Realize sin is a price that must be paid.
"For the wages of sin is death, but the gift of God is eternal life through Jesus Christ our Lord."
"And death and hell were cast into the lake of fire. This is the second death.
4) Realize Jesus Christ died to pay your price.
"But God commendeth His love toward us, in that, while we were yet sinner, Christ died for us.
5) Pray. Ask Jesus Christ to be your Savior, and claim His promise of eternal life.
"For whosoever shall call upon the name of the Lord shall be saved."