I follow several Literary Agents' blogs because they're full of advice as to what not to do or how to tighten your writing. I came across one recently that said, "Examine your work for 'begin to,' and 'decide to,' and 'seem' because these verbs weaken your work." So I used the "Find" tool and searched for each of these words. When I forced myself to eliminate them, it made the prose stronger. For example, instead of "she began to think about..." becomes "she thought about." And "he decided to kiss her" becomes "he kissed her." I learned there's no need to use these "deliberating" verbs. Just make it happen!
I've realized that the more I learn about the craft, the less I know.