The only way to learn to write is to force yourself to produce a certain number of words on a regular basis.
William ZinsserThere's no subject you don't have permission to write about. Students often avoid subjects close to their heart ... because they assume that their teachers will regard those topics as 'stupid.' No area of life is stupid to someone who takes it seriously. If you follow your affections you will write well and will engage your readers.
William ZinsserMost writers sow adjectives almost unconsciously into the soil of their prose to make it more lush and pretty. The sentences become longer and longer as they fill up with stately elms and graceful boughs and frisky kittens and sleepy lagoons.
William Zinsser