Quick Scripts

Some verses that I have found to directly apply to some specific areas in life...perhaps they may be what you're looking for, as well:

Anxiety:

Can any one of you by worrying add a single moment to your life?
Matthew 6:27

Therefore do not worry about tomorrow, for tomorrow will worry about itself.  Each day has enough trouble of it's own.
Matthew 6:34

Cast all your anxieties on him, because he cares for you.
1 Peter 5:7

Doubt:

The message of the cross is foolish to those who are headed for destruction!  But we who are being saved know it is the very power of God.  As the Scriptures say, 
"I will destroy the wisdom of the wise, 
and discard the intelligence of the intelligent."
So where does this leave the philosophers, the scholars, and the world's brilliant debaters?  God has made the wisdom of this world look foolish.  Since God in his wisdom saw to it that the world would never know him through human wisdom, he has used our foolish preaching to save those who believe. 
But to those called by God to salvation, both Jews and Gentiles, Christ is the power of God and the wisdom of God.  This foolish plan of God is wiser than the wisest of human plans, and God's weakness is stronger than the greatest of human strength.
1 Corinthians 1:18-21, 24-25

Hopelessness: 

For I know the thoughts I think towards you, says the LORD, thoughts of peace and not of evil, to give you a future and a hope.
Jeremiah 29:11

He performs wonders that cannot be fathomed, miracles that cannot be counted.
Job 5:9

Forgiveness:

...the righteousness of God through faith in Jesus Christ for all who believe.  For there is no distinction: for ALL have sinned and fall short of the glory of God, and are justified by his grace, as a gift, through the redemption that is in Christ Jesus. 
Romans 3:22-23