Scotty Smith has an encouraging post/prayer about Hebrews 3:12-14. Here is how he closes the post, though I encourage you to read it in its entirety (it will take less than 2-3 minutes):

Help me and my friends know how to hold each other accountable for believing the gospel, Lord Jesus. Help us to take each other’s heart-struggles seriously. Help us never to minimize nor marginalize the deceitfulness and hardening power of sin. Help us know how to preach the gospel to our own hearts daily, and to each other’s hearts increasingly, until Today gives way to the Day. So very Amen, I pray, in your all glorious name.