Learn To Give
The adage "You scratch my back and I'll scratch yours" was popularized to teach the younger generation that healthy relationships also need reciprocation. Not just when building and maintaining relationships, but in all situations, this is true. But you shouldn't give in the sense of calculation, just really want to give with a sincere attitude.
Of course, giving and receiving are not the same as an exchange that must always be made in exactly the same way. You occasionally need assistance, and so does your partner. Giving in this context does not mean dispensing money or other tangible goods; rather, it refers to the willingness to assist those in need while also sharing your own happiness and sorrow with them. It is also "give".