One way in which I incorporate white space into my layouts is to think of a "triangle." I simply divide my cardstock diagonally in half and fill one triangle while keeping the other empty.
The goal is simply for the white space in one triangle to balance out the heaviness of the other.
You can see that I filled the right sight with pictures and paper while keeping the left side blank. Here is another visual of the triangles.
Wishing you a great day!
Glitz Design "Felicity" 6 x6 Paper Pack
Glitz Design "77" 6x6 Paper Pack
Glitz Design "Felicty" Paper: Bits & Pieces
Glitz Design "Brightside" Paper: Butterflies
Glitz Design "Felicity" Alphas & Accents Sticker Sheet
Other: white cardstock, sequins, mist, white thread, diecut machine