Welcome! I'm fairly new myself but here is a quick "I wish someone told me that" list.
Don't do the follow me if I follow you. Check out tags and find interesting authors to follow.
Love what you upvote but don't love more than 20 things a day.
Unless you have a large following from other platforms, Steemit will take time to build (genuinely that is), but that's ok - keep being yourself and people who like your content will actually upvote you and not be just a follower stat.
Increase upvote rewards + interest = Steem Power(SP), safety + interest = Steem Backed Dollars(SBD), Easiest to exchange to other coins = Steem
Other Steemit Resources:
http://steemitboard.com/ - Your awards for progress on the this platform
https://busy.org - A 3rd party service that provides a more 'modern' interface for steemit
https://www.steemstats.com - Stats about your or anyone's account, blockchain!
https://steemwhales.com - Stats on accounts and rank list for the biggest players on steemit
https://steemd.com - a log of actions taken with your account or other on your content
http://steemdollar.com/ - Nice up to date price and locator for where to get the cheapest Steem
Thanks for the tips