Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus. -Philippians 4:6-7
Absolutely true. Going to Mass on Sundays is actually the bare minimum. We should also receive Communion and Penance regularly, and develop an active prayer life. Because of how much it lays out the spiritual logic of Salvation in Christ through the Church, I can't recommend the daily Rosary enough. If surrendering your life to God seems daunting, then doing these things allows Him to take over itty bit by itty bit.