Try everything - I thought I'd pigeonholed myself into the sciences since my natural talent lied within them, but art and music were always the most impactful parts of my life.  So I tried everything when I first started out.  Learning everything helped me to find out what I enjoyed the most and least, while also giving me a good understanding into the difficulties of each subject.

Focus on Your Strengths -  The books Strengthsfinder, Standout, The Fascination Advantage and Disc Personality Test are all tests about finding out how you're unique, and what your strengths are.  Once you've tried everything, focus on the areas you're strongest in.  My #1 strength is learning, so, that might explain this blog post.

Learn Business and Marketing - If you're an Independent Developer and don't have an income to hire a CEO and CMO, then you'll be wearing these hats for a long time.  With so many different games out there, you'll have to learn how to stand out, while also running a business.

Study Other Developers - Part of studying is also studying your fellow developers.  It's awesome how much our community is willing to share the areas they've failed in.  I studied Gamasutra's Post-Mortems in Afghanistan, and then conducted my own IndieDev Marketing Analysis.  When you search for other developer's wisdom, sometimes they'll even share their own findings.

Save Money - I recommend using your local library to save money.

Spend Money - I've listed several online courses in my IndieDev Education that I've taken. Spending money helps you to commit to applying what you've learned.  Truthfully, there's some classes and subscriptions I've partially regretted, but if I hadn't taken the chance, on some, I wouldn't have been as willing to take the chances on the courses I think did pay off.

Keep "Researching" - All those years playing games before becoming developers helps us to know the difference between quality and crummy games.  Don't lose that edge you've gained.

Practice What You've Learned - I made the mistake of not doing this enough.  There's only so much you can learn by reading.  You need to actually apply it for it to cement in your mind.

Schedule the Time - There's some days when you don't have the energy to read.  Allotting time in your schedule for learning helps ensure you'll be ready to do it.  Whether it be as you read in bed at night, or before the work day, allotting that time helps to get it done.

Don't Waste Your Time - Some books, and some articles don't keep your interest.  You can usually know when a book is going start boring you to death.  Don't waste your time grinding through it.  If you're using your library, it's free anyway.

Take Notes - I mark with a pencil the areas of the book I get the most of, and at the end, transcribe it.  I review a book's notes every morning as part of my morning routine so I remember what I learned.  Here's a spreadsheet of how I track which books I haven't reviewed in the longest time.