Here's the easy secret to it:
You only need to know a couple of simple and easy things about each.
So long as you're genuinely communicating a message others want to receive, well, you just found a whole new and wonderful tool to stay in touch, get the word out, read antic banter from those you know (or want to), and attend the equivalent of an anytime-anywhere in-your-house no-pressure no-driving get-together that doesn't involve one more tuna casseroles.
I'm using this post just to show a blog fan I just ran into that I'm savvy and with-it and, with a touch of noblesse oblige, I use blogging to encourage, embrace, and lift up others.
Always happy to.