The phrase "settled on" typically means to decide on or choose something after careful consideration. However, there are many alternative phrases that can be used to convey a similar meaning. For example, you might say that you "opted for," "selected," or "picked" a certain option. Alternatively, you could use phrases like "arrived at a decision," "made up your mind," or "settled upon" something. Other possibilities include "chose," "determined," "elected," "resolved," or "committed to." The right phrase will depend on the specific context, but by using a synonym for "settled on," you can add variety and clarity to your writing.