Two suggestions are:
* Qur'anic du'as, such as Qur'an 3:8.
* Spending time with believers (that is, Muslims who appear to have genuine faith and demonstrate good character, and who conduct themselves in a way that embodies the values of the Qur'an) and prioritizing living in an area with a strong and healthy Muslim community - ideally, somewhere where one can attend congregational prayers often. We become like those whom we spend time with.
I am sure there are some other good suggestions that will be mentioned too.