for remembering the spelling of a new word, I think pronouncing it correctly is very important, you can spell the new word according to the pronunciation. for remembering the pronunciation of a new word, listen more and read more.

listening songs and watching movies but only if u have a good vocabulary

Constant use through speaking and writing. :P

you can try cjc背单词学英语。I still use it.remenber:I don't advertise for it.this software have cycle-remember function.