Posting like you're Julia Child
Did you manage to make a turducken smothered in foie gras and a glaze of berries picked from the top of a mountain? By all means, post a pic of that immediately. Otherwise, nobody cares about the "gourmet PB&J" you made for your kid for lunch. Including the kid… he's still mad you didn't hack off the crusts.
Believing that having a keyboard makes you a valid food critic
Seriously, if you like something you ate, say you like it. If you didn't, say that. But don't unleash your amateur critiques upon the world, where you misuse and misspell words like "palate", "discernible", and "aperitif". Most food writers aren't even qualified to do this (see the byline up top).