Locating prefixes and suffixes in a set of letters makes it easier to create words. Many words use these, so this is an effective starting point to creating a word. Rearranging the order of the letters can also help to spot new words.
Prefixes and suffixes are types of affixes. Prefixes go at the start of a word, while suffixes are added at the end of a word. Longer words can potentially be created if the letters 'i', 'n' and 'g' are available, since many words use the "-ing" suffix.
Changing how the letters are displayed can make it easier to find new words. If the letters are laid out in a straight line, it may be more effective to arrange them in a circular pattern.