Start by piecing together letters that usually appear together, such as "ch," "sh," "qu" or "ph." There is no guarantee the jumbled word has these combinations of letters, but it is more than likely to follow this order.
Other helpful methods include separating the vowels from the consonants for a fresh look at the problem. If you are a visual learner, grab some spare Scrabble tiles and see if you can formulate a word from the given letters. Sometimes it also helps to write the letters in a circle, like the face of a clock. If all of these methods fail, try using an online word unscrambler to assist you.