To become proficient at scrabble or online games like Words with Friends, it's sometimes necessary to go outside your comfort zone and expand your vocabulary. This article suggests a few ideas you can use to improve your vocabulary, and subsequently your use of Scrabble words.
One simple way to improve your vocabulary is to build flash cards with the common two and three letter scrabble words. See how many you can memorize, and test yourself by including some non-existent combinations of letters in the mix. You can also avail the benefits of word scramble solver via scrabblewordcheat.com/word-scramble .
The best possible way to pick up a larger vocabulary is to read more, and to vary the sources of your reading as much as possible. Pick some books that you enjoy and expand into different genres. You can also use an online Scrabble word finder.
There are online resources which list the complete Scrabble and Words with Friends dictionaries. You can quickly and easily determine if a word is valid or not, and see other word combinations that can be made with the same selection of letters.
The mental ability you use by pulling letter combinations out of a boggle grid is the same mental process you can use in Scrabble or Words with Friends.