Good descriptive paragraphs are really fun to read because they fuel your imagination. A good description allows the reader to be a part of your world, to clearly imagine the scene, to feel the sensations, the smells and the tastes of the subject you are writing about.
Since it is much easier to build sentences to reflect your ideas when you already have them, there are a few things to think about before you are ready to write your descriptive paragraph: Pick a topic you feel strongly about, for example, something you like very much, or something that you dislike very much.
Think of your 5 senses in relationship to this topic.
What does it smell like when you are in contact with the subject you are describing? For example, does it smell like oranges, or rotten fruit, or like sweet perfume, or like nervous sweat?
What does it taste like? - Is it tart, or sweet, or bitter, or creamy?
What does it feel like to the touch? - Does it give you a stomach ache? Does it make your muscles relax? Is it rough, smooth, sharp, slippery?
What does it sound like? Is it loud, or soft, or shrill, or soothing?
What does it look like? What is the color, the shape, or the height or the depth?
Summarize your feelings about this topic in one sentence.
With ideas already in your mind, you are ready to start writing: Start with your main idea. It is the summary of your feelings about this topic.
Continue with explanations for each of the senses you have chosen to use.
Connect each of the senses back to your main idea. This allows you to remind your reader of your general thoughts about this subject.