You have to be active first off. Secondly I would recommend joining some curating and post-promotion Discord groups. Thesteemengine is a good one that I belong to and there are some VERY active members there.

I know you said you were gone for a short time, so you may have flown under the radar of your following now. You need to make a post as soon as you're able to to let them know you're back and give them an update about maybe what things you'll be posting about; giving them a sneak peek may have them watching for you again.