“Fix it in Post”
This is what I always do!
This is the thumbnail for my latest design:
But this is how the picture was taken:
I use photoshop to correct the “levels”, it has an eyedropper tool and you just point to what should be white and it fixes it for you. But there are free online alternatives that do the same like:
Just upload your photo there. Go to Image → Adjustment → Levels
Select the white box on the bottom of the window (1) and click on your picture to select what should be white (2) and it auto-corrects for your white balance and exposure:
Yes, it would have been better if you had more light to start with, but even this photo is workable as you can see.
I have no specific location, lights or background for my photo’s. Just something white (table, paper, car, something) with enough light (LED, sun, kitchen, at work, etc.) and:
“Fix it in Post”
Hope this helps!