What
Leaving appreciation or sweet notes. Whether you are in a romantic or friendship, employer or student, leaving appreciation notes or sweet notes for them can make them feel better about their relation with you. It could be one of the ways to strengthen the relationship with others.
Here's a small appreciation note for 7Cups Community and all whom I know and interacted with.

Now, as per you, Whats the single most important way to strengthen your relationship?
Tagging some awesome people. To add or remove your name, please submit this short form https://goo.gl/BkDfbw
@Amelia @Laura @Anomalia @Monbon @Helping2findaway @BeyondTheInvisible @Akshita0612 @Gentledreamer76 @Reyy @PalmTreesnRainbows @Danielagolbert @Panda1231 @Carbygirl @Maepainful @hello9409 @bestsquare8396 @Seacook @ShyTangerine3761 @Sunnite @Lifewillbebetter @StrawberryCheesecakes @Hypnosis @Delicatewindow53 @Marshmallows @Justhurting02 @Longing4peace @Spacephoenix7 @Vlavla @Ang333 @AmbitiousSpruce6173 @Anp3978 @Butterflycat @Brightcat6326 @umon @IndigoMyst @Sadlemon48 @PowerfulPapaya7755 @@Bunnyssong @Sonya22 @Emmawilsss @BookLover95 @Rebekahwriter13 @LavenderSubmarine @SmilingCamel55 @Philosophicalship9444 @ScarletPear1945 @ScarletLand3247
Resilience is understood especially involved in a Long Distance Relationship with Silent Honesty, when each other's occupation keeps them busy from communicating.
Continue to believe in the goodness and the foundation that created the relationship, the only separation is the distance, not each other.