1 Corinthians 15:3-4 (KJV) For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures:

This is the gospel (good news) which will save you today.

God requires the gospel to be believed for salvation:

Acts 16:30-31 (KJV) And brought them out, and said, Sirs, what must I do to be saved? And they [that is, the apostles] said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.

To believe the gospel is to trust it for salvation:

Ephesians 1:13 (KJV) In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,

What to do

1. Believe that Christ died for your sins, was buried and rose again;

2. Trust this for your salvation