When 2 Chronicles was first written, the audience was the remnant which had returned from exile, resettled the land, and rebuilt the temple. This book, along with 1 Chronicles, taught these people lessons from the past (the glorious times of obedience and the distressing times of sin), illustrated God's faithfulness in the present (he had delivered them out of exile and they were back in their land), and looked forward to God's fulfillment of promises in the future (the covenant with David would yet be fulfilled in a glorious Israel).
What is true for this remnant is also true for you. Though the historical context is different (you are not an ancient Israelite returned from exile in Babylon), you do have a past, a present, and a future. What have you learned from the past about walking with God? How is God presently showing his faithfulness? As for the future, are you fixing your hope on what God will do or what you might be able to squeeze out of this world? Take a moment to check out 1 Peter 1:13. The hope of Israel's future is also yours.
