For the best results, keep both the soda and empty drinking glass in the refrigerator.

Then start with an empty glass tipped 15-20deg toward open can or bottle of soda.
Pour slowly onto upper inner edge of tipped glass until half full.
Stop with enough room in the glass for additional ice volume. Place each cube into the surface of poured soda before releasing it.

If you’re insisting on ice first, use the other techniques but with a preloaded glass instead of empty.