Having just departed an airport, you should already be most likely climbing at Vy. 
At about 1,000 AGL (or as required for terrain) slowly pitch the nose forward enough to accelerate to the recommended climb speed as published in the POH while keeping full power (control airspeed with elevator control/pitch). Remember to use rudder as appropriate to counter the aircrafts left turning tendencies while at high power/pitch settings. 
Use trim as needed to help relieve flight control pressure
Complete the &quot;climb&quot; checklist as appropriate