I recommend refraining from sins. If a person is indeed able to fully control all desires and block out Satan, they will reach high levels of spirituality. In addition to that, I would recommend doing some recommended acts in addition to the obligations. For example fasting when possible, doing the duas after each prayer.
Finally, I recommend seeking knowledge. The more Marifa we have of our religion, God, Quran, Prophet and Imams, our worship will carry more meaning and value.