Sanctification the ongoing process

 Sanctification is related to your obedience, If the Spirit of God
ask you to do something, do you obey? If he ask you to witness to your friends
do you? If he ask you to give to someone in need, do you? if asked to pray do you?
or if he ask you to be more loving and caring toward others do you? 
Every-time you obey, you act more like Jesus. Thus the process of Sanctification is at work.
 I hope this helps