God will establish Christians to be full of good works (2v16/17) - sacrificial service (3v8) that flows from our commitment to hold fast (2v17) to the gospel. So, stick to the tradition you've been taught (3v6) and fill your time with good works, fulfilling your responsibilities and being a blessing to others, not shirking them and being a burden (3v8). But be careful not to grow weary as you do good (3v13). Win back those brothers or sisters who repeatedly disobey God's word by having nothing to do with them (3v6/14/15).