I am constantly working on my iPad. I use it more than my iPhone and laptop combined. Therefore, I like to choose wallpaper that inspires me and reminds me of my short term goals.
Last week, my wallpaper featured a dress form, which I recently purchased. This week, it's magazine covers. I'll admit that the collage of covers is quite busy. I used a Photoshop app to tone down the exposure (along with other effects) so the apps can still stand out.
The point is that I like to stay focused on my goals. There are plenty of distractions that can easily sidetrack you. One of my favorite quotes is from Bruce Lee is
“The successful warrior is the average man, with laser-like focus.”
Visual reminders, like a vision board and wallpaper, are very helpful in staying focused.