While tools like the Magic Eraser can sometimes remove your backgrounds, the fact is you’re going to have to get your hands dirty with the eraser if you have images with complex backgrounds that need removing. While this can be time consuming, you can save yourself a lot of time with a little Photoshop wizardry. Let’s take a look.
Right click your Background Layer in your Layers Palette, and choose “Layer from Background…” It automatically renames as Layer 0. Simply press OK.
Your Layers Palette should only have a single layer, your newly unlocked “Layer 0.”
Press 
Use your Lasso to draw a rough selection around your image. Don’t worry about being precise—we’re going to cut it out with more precision later.
When your selection is done, press 
Press 
Visit your Control Palette again and set your “Mode” to “Pencil.” This ensures your eraser has a hard edge.
Use the eraser to mouse around and delete the parts you don’t want. Get close to your image, but be careful when cutting into it.
Keep in mind you can always undo with a swift 
You don’t need to remove every bit at this point. Once you’ve created a continuous gap around your image, we can start to remove the superfluous stuff you no longer need.
Here’s where it gets a little advanced. You can simply use your eraser to remove the remainder of your image, but I don’t like spending more time on a routine task than I need to.
Hold 
Open the Channels Palette and click the icon 
Select this Alpha Channel (likely “Alpha 1”) by clicking it. It also lists a shortcut to it. A simple 
Go to Edit > Fill and set your fill Dialog Box to “Use: White” like I show here and simply press OK.
Your Alpha chanel should fill with white in the shape of your roughly cut out image. Press 
Click and hold on the Gradient Tool to bring up the Contextual Menu. Pick the Paint Bucket Tool. Ensure your “Foreground Color” is Black.
Simply click in the areas you don’t want to fill them with black. If any of your superfluous areas touch your image, it will fill as well, so be careful.
Press 
Return to your Layers Palette. Press 
Your image is now precisely cut from your background.
I usually click the 
Image by Careyjamesbalboa via Wikipedia, in Public Domain.
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