FULL STORY:  According to a survey of happy couples by Zoosk.com, here are eight things you should do if you want a successful relationship:  

1.  Share responsibilities:  Four out of five happy couples share decision-making . . . two out of three share financial decisions . . . and two in three split chores evenly.   

2.  Have lots of sex:  Three out of five couples said they have sex at least twice a week . . . one in three have it at least four times a week . . . and 16% of couples do it EVERY DAY.  

3.  Be affectionate when you're NOT having sex:  69% of happy couples kiss each other and show affection several times a day.    

4.  Be honest:  70% are always honest with each other . . . and don't even tell little white lies.  

5.  Stay in shape:  Three in four couples say it's important to be in shape . . . and 18% say their partner's physical appearance is the thing they're most attracted to.  

6.  Don't talk about politics:  37% of happy couples say they NEVER talk about politics . . . and another 47% rarely talk about it.  

7.  Be the same religion:  71% of happy couples have the same religious beliefs.  

8.  Communicate:  72% have in-depth conversations about work . . . life . . . and family on a regular basis.