Word will remember better if they meet in text which you read or listen, i think.

Second. words must be learned in the context of situations of use.

the pic is expressive... :)

I would say it depends on where you are at. You seem to know basic english, but if you are barely starting I would say memorize the most common words. If you are more advanced than I would say the best thing would be to read a lot of books written in English.

Thanks for you help ;)!