It is a known fact that if you get your background looking amazing, then your whole canvas will end up looking amazing. One of the harder parts of getting a good looking background is the limits of effects you can use without taking the shine off of the other objects in the foreground. One of the best tips for designing a good looking background is using masking. Here are some tips to start off.
Use the eraser
The eraser tool can be manipulated into erasing areas in a pattern and you can then use overlay and other blending modes to create a great camouflage. As the eraser tool comes with opacity, hardness and size just like the brush tool you can use this in a way to rid of the brighter colours and unnecessary shapes. Eraser tool also has different shapes and brush tips that you can use to get the effect you need. If you are a graphic designer and working on a slogan for a branding company then you can get going with using multiple layers of colours and then erasing separate areas to emphasize the slogan. If you need to clean up an image to bring in more details then you need to zoom until you see pixels and start erasing; this process takes a lot of time and even more patience to take finish.
This tool allows you to delete an area of a layer by fixating on the similar shapes. It is used mostly in logo creating and such for a trademark company or pamphlet making and such where you need to deal with multiple graphics of same shape. You can set the tolerance level for this tool and it will change the sensitivity of the tool for selecting objects in the layer. Lower levels of tolerance selects objects and leaves a border while higher levels of tolerance cracks down onto the border of the object. This tool is extremely useful in extracting text and other small objects from an image.
Adding layer masks
There are different types of layer masks that you can use on Photoshop. If you do not want to delete the part of the image but you do not want it showing up either, then creating a layer mask will allow this (you can also go for layer via cut option).
Once you have your masks set up, then go for refining the edges which allows you to make transitions look smooth and subtle and also your image extraction will not end up being the focus of the canvas.