You can look for simple three-letter and four-letter words in the random letters. You can also look for common prefixes such as "un-" and suffixes such as "er-."
After you have made simple words, you can see if the words can be extended into plural forms for nouns and into other tenses for verbs. Practice rearranging the random letters by alphabetical order. The alphabetical arrangement of letters is called an alphagram. Use mental imagery and storytelling to memorize words that share the same alphagram. You can also memorize a list of two-letter words and words starting with the letter "q."