Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: There is something v satisfying about  opening an old 'to do'.doc file and being able to check off all the things you have done #smiling
This tweet contains emotions: 
joy, love, optimism