The key I’ve found for writing or posting after a long break is the ability to brush it off and make it not awkward. Of course, you want to address the reason for your hiatus.
For example, I haven’t posted as much as I would probably like, because I’ve been flooded with being busy due to the 8-week intensive program known as Startup Institute that has eaten up all my time and energy. [/shamlessplug?]

(I swear, this hasn’t been me.)
There is always the risk that your followers will read this as an excuse. And, barring getting stranded on an island full of Velociraptors or something equally catastrophous, it usually is. But, it’s really up to you to find the compelling reason why they were invested in you to begin with and channel that.

(And I know you all come for the gifs.)
Of course, the best you can hope for is that all will be forgiven and that everyone will move on. But, you can’t expect that everyone will be as patient and understanding as you might hope. You will probably get some hate. And you will definitely lose followers. That’s the bottom line.
But, let’s be honest. You should be writing for you (and the people who actually care) and not for them. Keeping a working schedule is always great. But, you should always write with the eternal mantra:

(Truth.)
#transformandrolloutmfers