Just reached 2000 followers on the Deprocrastination brand account, finally.
Wouldn't be nearly that far without my personal account, where I retweet what I think is worth it to my followers.
However, I also made a couple changes to get a bit faster growth:
I plan to include more visual (re-use illustrations I'm creating for the Instagram account).
What really pushed the account over the 2000 were a couple RTs from people with 15k+ followers - some that I've interacted with personally, some that I didn't know. Each RT like that has attracted 30-150 new followers in a short amount of time.
Hope this helps!