Self Discovery

I learned three important truths about myself while working a crossword puzzle. Here they are in order of significance:

3. I tend to overcomplicate things;
2. I spend way too much time at Starbucks ; and
1. I need to brush up on my spelling skills.

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A 5-letter word beginning with "D." The clue was "a coffee order."

I wrote in D O P I O .

The correct word, of course, was D E C A F .