Silence isn't the goal in itself. Seek to say what can glorify God and edify others. Be in God's Word and prayer for discernment on this and diligently seek Him for self-control to not speak when it isn't necessary, isn't proper, and/or can't edify.
- Psalm 141, James 1:21-27, 1 Peter 4:1-11, Hebrews 4:10-16, and 2 Timothy 1:7-8 are some related Scriptures that come to mind which you could meditate on.