Our four favorite ways for getting more followers on Instagram and Tumblr:
1. Post great content.
First, you need to post content people actually want to see. Instagram and Tumblr are all about the visual aesthetic, so embrace it.
2. Time your posts appropriately.
The most successful Instagram and Tumblr accounts post at least once a day, and typically not more than five times a day. If you’re looking for the best time to post to these platforms, post outside traditional US business hours.
3. Find and follow interesting people.
Try searching on a hashtag related to a topic you’re interested in, and follow people posting content you like. If fans are talking about your or your brand, give them a follow back and engage with them - they’ll appreciate it. Basically, if you follow new people, many of them will follow you back.
4. Use (hash)tags.
Hashtags increase content discoverability, so use them in your posts. Adding a hashtag is the single best way we’ve found to get content in front of new audiences.