If you are, then you can cash in appreciated stock or mutual funds at a 0% tax rate so long as the gains do not put your taxable income above the 15% tax bracket. You can then immediately buy the same stock back (if you want) and the new price will be what is later used to figure gain when you sell it again. You can do this every year and effectively eliminate gains from potential taxation! This is why I call it the reverse wash sale. Wash sales only apply to losses, not gains.
Here is a list of things to consider when determining if it's worth contacting your tax professional for help on this:
Much of the above involves over-simplifications, but it gives you a starting point to see if you might be close.
If the above apply to you, wait until mid-November, and contact your tax professional. Provide them with copies of your recent pay-stubs from all your jobs, as well as amounts of any other taxable income you have or expect to receive before the end of the year (interest, dividends, capital gains, etc.) They should be able to calculate how much gain you can have and still pay 0 taxes on it. Don't worry if it's not perfect, even if you go over a little, only the portion above the 15% tax rate gets taxed, and this at a favorable rate. Once you have this number, review your unrealized gains and losses information from your brokerage account and determine what to sell to stay below the number they provided.
You can do this every year you are in the 15% tax bracket!