According to blessed Theophylact, "we shall be sharers of the Resurrection, since we have shown the resurrection that consists in good works."
Co-resurrection with Christ is, of course, only an encouragement to hope. Yet it is founded on this: Christ, having died and risen, will die no more. He will live eternally with the Father, sharing His glory and ordering the gracious Kingdom with full authority in heaven and on earth.
We also have died to sin, and therefore there is no second baptism for us. Consequently, only one thing remains: to hold fast to sinlessness and dedicate our life to God. Then we shall undoubtedly rise together with Christ.
For this actually to take place, we must first of all remember two things. First, we are dead to sin. Second, we must live only for God, since we have been grown together with Him, and in Him lies all the hope of our salvation through Jesus Christ.