This is definitely is one of the biggest challenges of the relationship. If you think girls don’t care about their families opinion be prepared for a very short relationship. 
Most girls contrary to your opinion are quite attached to their families and the family’s opinion will play a big role in your love life. So to have a smooth love life, try to create a congenial relationship with your lover’s family. Ask your girlfriend for details on family dynamics, their sense of humor, their professions and hobbies.

The first time meeting

This first meeting has the entire formula needed to make a perfect disaster, so tread carefully. Dress yourself according to the place of meeting if it’s their house or your girls house dress casually but elegantly in trousers and shirts with a spiffy jacket. (Jeans and tees are a definite no-no). If you’re meeting them in a restaurant or club dress up fancier, say in a suit.

Bring a gift wine, candy, flowers, if you’re going to their home or offer to pay, if you’re dining out. (Deep pockets are a sure fire way of earning approval)

Keep the conversation light for the first time, show an interest in the family and focus on learning about them and compliment them on their daughter, (but don’t lay it too thick please) Avoid sensitive issues like religion, politics, race relations, foreign affairs at all costs. (This is not the time to express your individuality or opinions)

The Siblings

Guys are often so busy trying to impress the parents they often forget how important the siblings are ( in some cases more important than the parents).

Her sister especially will be the hardest to impress but once you have managed to impress her she will become your strongest ally. Ask her questions about your girlfriend and what she was like growing up, she’ll be impressed that you want to know more about their childhood and she’ll relax telling familiar stories.

Brothers are easier but still be wary of them, try some male bonding with them over baseball and beers or other interests. Brothers can ease the way for you especially with the mothers so try getting on their good side.

Do you feel the lady friend on a date will be your perfect match? Want to propose to her? Then go and impress the girl of your dreams!
Be magnetically attractive: Women love to date dazzling men. But that doesn’t mean you have to resemble a Hollywood star! Be presentable. Shower, apply cologne and take mouth fresheners before going out for dating. Choose the best from your wardrobe and this will surely amaze your lady.
Keep it casual:  Always be polite to her. Don’t overdo this, because this may sound formal. Open the door for her. If dining at a restaurant, pull out her chair so she can sit and push her in. Ask about her food.

Talk in style:  Keep talking! This will surely work on a date. Unusual silence doesn’t create a good impression. Ask questions about herself- her liking and disliking, her favorite color and so on.

Be a good listener: Women always want men to be good listeners. So, keep your eyes wide-open! Listen to her stories.

Good humor: Show the funny side of you. Be hilarious but don’t behave like a clown. Entertain her with your sensible jokes.

Compliment her: Praise her beauty in a sober way. Add some compliments to the chat like “you shoes are looking great!” “Your dress is nice, you look gorgeous wearing them” and so on.

On the way to her house/your house, ask her if she enjoyed it. If it sounds like she had a good time, talk about how you enjoyed it and want to know if she would go out with you again sometime.