combine a characters desire with events. First, define the main thing that your character wants. For instance, Isabella really wants that great new job she applied for. After that make a list of monoments in which the character has to react to various things that happen. For example (Isabella rips her shirt off and her boss watches her like a creep, Isabella walks hoe and notices a person in danger, isabellas friend matt calls her and tells her he’s depressed.
Continue on this for a page or more and then start to connect these events to isabellas motivation. You will pick and choose from these events, not using all of them, but once you picked the three most compelling, write the story about isabellas wish for that new, better job (Or whatever you choose) with your scenes already somewhat defined.