How To Achieve Ikhlas

Ways that we can mancapai sincere sense is to empty the mind dissat we're to worship Allah SWT. 
We only think about God, pray to God, for God's remembrance, all the charities that we do is for God. Forget all worldly affairs, we only focused on God. Never show race riya 'or arrogant in us because we are not powerless in the face of Allah. Feel the presence of God is in us, and are watching us. 
Insha Allah in this way you can achieve sincere. And do not forget to pray to God so that we can worship sincerely for Him, as do 'A Prophet Ibrahim, "Verily if my Lord does not give guidance to me, surely I
including those who go astray. "(Surah al. An'am: 77).