Be sure to keep enagaged on Instagram, it’s social media so it's reciprocal, you need to be following fans, bands and brands, liking and commenting on their photos, especially if they mention your band.
If someone has taken a picture of your gig and posted it on your Facebook, like the post on Facebook and the photo on Instagram. You could even have an album for fan Instagram Photos. Also, remember to reply back to comments, it’s rude of you not to.
Don't have the too cool for school vibe. It's ok to double tap on other up and comers stuff as well. You don't have to follow every single person back, but if someone has a cool profile show love!