Patch tool
With the patch tool you select an area and drag it onto a clean part of the image, after which Photoshop borrows the texture and blends it in neatly. It combines the ease of a lasso with the blending power of the healing brush. Ideal for larger blemishes or distracting areas.
Draw a selection around the problem area with the patch tool and drag it onto a clean source, or work the other way around with the Destination setting. In Content-Aware mode Photoshop fills in even more smartly based on the surroundings. Use it for wrinkles in clothing, marks on a wall or a distracting object on a plain background. Tip: duplicate your layer first, so you can easily compare and undo the result.
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The presets on this site set these adjustments up for you as a starting point, which you then fine-tune to taste.