1. Make sure you describe one thing: An event, activity, person, or place. Sometimes people forget their topic and describe more than necessary.
2. Establish and sustain a single impression. For example, if you are writing about your worst holiday, be clear about why it was your worst. Was it boring? Was it disappointing? Was it scary? Similarly, if you are writing about a parent or relative, focus on a particular quality that shapes his or her personality.
3. Make sure your details are relevant. Lots of details are useful because they help the reader visualize the person, place or experience. But they only help if they reinforce the impression you are attempting to establish.
4. Go easy on the adjectives and adverbs. Especially be careful about "very," "really," and words ending in "-ly," such as "extremely." Good descriptions are build upon effective use of nouns and verbs.