I think I might have talked to you about this idea, but I'm going to copy and paste a daily devotional that I thought was really interesting:

“'Truth, wisdom, learning, and good sense—these are worth paying for, but too valuable for you to sell.' Proverbs 23:23 (TEV)

We like to spend money on comfort, but the Bible teaches that it is wiser to invest in character.
God wants us to take some of our money and invest it in ourselves — in personal and spiritual improvement. The Bible says,  'Grow in spiritual strength and become better acquainted with our Lord and Savior Jesus Christ' (2 Peter 3:18, TLB).

God wants you to develop skills and educate yourself so that you can become the kind of person he has shaped you to be. The Bible says, 'Buy truth — don’t sell it for love or money; buy wisdom, buy education, buy insight' (Proverbs 23:23 MSG).

Any time we use our money to buy a Christian book or a CD that helps us grow, we’ve invested in this fund. Whenever we use our money to take a class or learn something that makes us more of who or what God wants us to be, we’re investing in our growth fund. And God is smiling because we’re using our money in the right way.

Why would you not invest in growing your own character? What one step will you take today to invest in your growth toward Christ-like character?"

What an interesting idea! I'd never really thought about it before. Investing in Bible classes, small groups, Christian counseling maybe should be nearer the top of our priority lists then we realize.