I'm an American in my mid 20's. Is there something I should be doing to secure myself financially?
Buy this book.  It is a short, simple crash course on personal finance, geared at someone in their 20s just starting out their career.  You can easily finish it in a weekend.  The book is a little dated at this point (pre housing bubble), but it is still valid.  I personally feel it is the best intro to personal finance out there. 99% of the financial advice you read online will be a variation of what is already in this book.  If you do what the book says, you should be in a solid position financially.  You won't be an investment guru or anything, but you will at least have the fundamentals. There are various "protips" for personal finance that go beyond the book, but I would advise against paying too much attention to them until you have the basics down.