Making word associations, chunking and repetition are techniques to remember spelling. The brain makes connections between new information and what is already known. Associate a difficult name or word with a familiar idea or word. The brain automatically remembers the new word once it is connected to the old.
Break the word into several chunks of letters. Top spellers use this method. It is easier to remember how to spell each small chunk and then connect it with the whole word. Repeat the word often and immediately. Make a habit of saying the difficult word out loud, or write it down for better memory.