ensure that you explain yourself properly, link to tutorials or free patterns, where necessary, never assume that your reader is at the same crochet level as you are, explain techniques, patterns and stitches as simply as you can using simple words. Engage your reader, let your own enthusiasm for crochet shine from your hubs. Only write about aspects of crochet that really interest you. Never write about something that bores you. Also try reading other hubbers' crochet articles and see how they write about crochet, it may help you. Write longer rather than shorter articles. Look through the crochet questions every so often and see what readers need to know, it will give you ideas.