Quick Note: White Space Isn't Actually Empty
The 'nothing' areas of an interface are usually doing the most work.
As a beginner designer, I used to see white space as a gap that needed filling. Every time I spotted empty area, my reflex was to add something to it — an icon, a caption, a divider line.
Over time I realized white space is actually the quietest and most powerful design tool available. The space around a heading is what makes it feel important. The gap between two sections tells the user "take a breath, we're moving to something new now."
My favorite test: take a screenshot and squint until you can't read the text anymore. Does your eye still know where to look? If everything reads as the same gray density, white space probably isn't doing enough work.
Next time you feel the urge to add something to an interface, ask first: is something actually missing here, or am I just uncomfortable with the empty space?