Common character issues: m is similar to a w, n is similar to a u, a t often is not crossed, and i not doted.
Classic example, the words Lintels and columns
Many of the alphabet characters in both upper and lower case often might be distorted, but she is fairly consistent, so once you become accustomed, it becomes easier.
It often helps to ask several other people if they can read the character or word you can not decipher.
Review the overall context of the phrase, sentence or paragraph which may suggest what the word would be. Look to see if one or more the words in the document are similar, may be more readable, and fit the context.