“…And I want to remind you of the saying of the Prophet  (صلى الله عليه Ùˆ سلم): “The believer who mixes with the people and is patient with the harm they inflict is better than the believer who doesn’t mix with the people and isn’t patient with the harm they inflict,” as reported by Ahmad and others from Ibn ‘Umar.

Based on this, what I advise you to do is to be patient with your family and to withstand their harm and to strive to give them da’wah and try to save them from the Fire, as in the verse: {“O you who believe! Save yourselves and your families from a Fire whose fuel is men and stones. It has stern, severe Angels watching over it who don’t disobey Allah in what He orders them with, and they do all that they are ordered.”} [at-Tahrim; 6]

And I hope you don’t think of leaving the house and abandoning them. Exhaust all means of da’wah with them, especially if staying with them will have some effect on even a few of them.

Beware of starting off in a harsh and extreme way that will turn them off. Rather, talk to them according to what they understand with wisdom and kindness, as Allah Said: {“Call to the way of your Lord with wisdom and kind way of speaking, and discuss with them in the best way.”} [an-Nahl; 125]

And remember the saying of the Prophet  (صلى الله عليه Ùˆ سلم): “Give glad tidings, and do not turn people away,” and: “Indeed, gentleness isn’t found in something except that it beautifies it, and it isn’t removed from something except that it ruins it.”

And start with the most important issues, and go in order. Don’t get into arguments with them over secondary matters while their principles are messed up. Instead, begin by addressing the principles, and if you happen to come across problems in secondary issues, tie it to the main principles and don’t make your enmity with them except when it comes to the basic principle of the Religion, Tawhid, its nullifiers, and what breaks its firm handhold…”

Source: http://iskandrani.wordpress.com/2009/10/14/advice-on-dealing-with-family/