Select a screw with the correct head style for the job. Choose a screw long enough to provide 30mm embedment into the wood being fastened to. Choose the correct driver for the screw being used. Fix driver to a power screwdriver set to at least 1500rpm. Put screw onto driver and place at fastening position. Push sharply on screwdriver to create a starting point. Squeeze screwdriver trigger and maintain firm end pressure until screw has drilled and fastened.