Throw stones at him and shake the tree. Let him fall, but force him to climb back up. Stone him again. Give him enough intelligence to figure out how to avoid the stones and get down without too much injury. Hate your antagonist, but make sure your readers love to hate him.
Variety is the spice of literature.
In fiction, figure out WHAT your characters want, WHY they want it, and WHY they don't have it yet. But more importantly, get into the intangibles. Fear, Love, Insight, Drive, Peace. The more adjectives, adverbs and passive verbs you can eliminate, the more powerful your writing. Supply the significant detail and let imagination do the rest.