Some useful links:
bobblehead said:Motley Fool Personal Finance guides: http://www.fool.com/pf.htm
The 60 second guides are a very good place to start if you need to know everything from the ground up. Nearly all of the free links from that page are well worth reading. I do not advise buying any of their paid products with the exception of the Discussion Boards subscription. You can preview these boards by signing-up for their free Discussion Boards trial (read only, can't post) and see what is of interest to you. Some useful boards include "Credit Cards and Consumer Debt", " Foolish 401(k)s" "Insurance - Life, Car, Home,etc.", "Living Below Your Means", "Physicians and HC Professionals", "Retirement Investing" "Tax Strategies".
Some healthcare specific information about how to minimize your taxes and other basic financial information. Their Q&A forum (The MDTAXES Message Board) is helpful if you have a specific question.
Tax guide for investors. Their "Reference Room" link will summarize all the IRS numbers you need to know off hand. Also helpful are their detailed Roth IRA guide and the Message Board.
Vanguard Diehards: http://www.diehards.org/
Front-end for the Morningstar.com Vanguard Diehards forum. This is a useful board if you feel index investing is a good strategy and LTBH appeals to you. Please note that Morningstar boards may require a small subscription fee now if you don't already have an account.
Armchair Millionaire: http://www.armchairmillionaire.com/
This has some reasonable commentary about asset allocation. You do not necessarily have to buy anything from the website to benefit from the knowledge you can gain.
The Coffeehouse Investor: http://www.coffeehouseinvestor.com/
Another good site discussing the basics of asset allocation and the benefits which you can derive from this instead of chasing winners.
John T. Reed real estate investing: http://www.johntreed.com/realestate.html
This site has a lot of interesting information about real estate investing. Particularly interesting is his ratings of the "gurus" out there. The reviews aren't pretty but reflect his views. Of particular interest is his extensive review of Robert Kiyosaki and "Rich Dad, Poor Dad" which should be read by anyone considering reading his book (http://www.johntreed.com/Kiyosaki.html).
401k "Shaft" Detector: http://www.retireearlyhomepage.com/401ksft.html
Particularly of interest to most residents since most programs do not match is whether you're better off investing in your 401k or a taxable account elsewhere. Use the spreadsheet here to make that determination. In general most people will be better off funding a Roth IRA during residency before an unmatched 401k/403b.
If you own a mutual fund this non-commercial site will give you some interesting commentary, reviews and guide your decisions on whether or not you're holding a worthwhile fund or a 3-ALARM fund. The "Highlights & Commentary" section of the website is well-worth reading every month to become aware of some of the shady dealings that go on.
N.B. I have no affiliation with any of these sites, except I use them for my personal finances.