What are some great ways to remember new vocabulary words and their definitions?

Write them out consistently, record yourself, put them in sentences, use them in your conversations during the day, get someone to test you

Most vocabulary words are learned from context. The more words you're disclosed to, the more better vocabulary you will have. While you read, pay really close concentration to words you don't understand. First, try to find out their meanings from context. Then look the words up. Read and listen to hard material so that you'll be bared to many new words.