I use my blog http://gulfcoastlagniappe.blogspot.com, where I have a widget for WikiTree as well as Facebook for connecting with relatives. When I have brick walls, it has been really great to write about my research and ask for any information anyone could add via my blog. I have received a gold mine of information and help from distant relatives in this way. Plus making lasting relationships with those who are serious family researchers like myself. Using Facebook by searching relatives who may also be on Facebook and sending them messages, asking for photos or help may seem kinda creepy, but I have overall had good vibes from this and it has helped tremendously in contributing research and forming relationships with lost 2nd cousins.
I've also made family groups on Facebook for each branch of my family and my spouses and have added all relatives to it and asked they do the same and here it becomes like a family reunion where we share photos, family stories, etc. I always share a link to my WikiTree tree so they may also add there. They are always excited about seeing what I have added to the tree.