It's a good idea to visit relatives whenever you can — within reason of course. Everyone is busy with their lives and many families are scattered in different states. It can be especially rewarding to visit with parents and siblings, but visiting your extended family members such as aunts, uncles and cousins can also renew family bonds.
Although advances in technology can keep us in closer contact these days, it's still nice to visit family members in person when you get a chance. How often you decide to visit your parents and other family members should depend on how often you want to do that and how often time and distance allow you to. Of course, you must also be considerate and not invite yourself to stay with your relatives just because they are your family members and you expect them to look after you. No one wants or deserves free loaders of any description.
If you're genuinely interested in spending time with your family, however, they would probably enjoy having you stay in their home for a few days every now and then. Of course, you can return the favor by inviting them to visit you. If your parents live near you, then you don't have to worry about staying in their home and can drop in for visits during the day or in the evenings. The main thing to remember is to think about what types of visits they would prefer.
Remember, there are no rules about how often you should visit relatives, whether they are your parents or your cousins. Just try to base all aspects of your visits on mutual respect and remember that no one will be around forever. You don't want to regret not visiting a special relative when you had the chance. If your family is geographically spread out, you may want to have a family reunion if and when everyone would be able to attend.