Original credit to Malkoris on the TT site.
Fine - Wake up after sleeping to clear out other emotions in a room with nothing inside (and no negative moodlets from neglected needs)
Happy - Any "decor" without any other moodlets
Confident - Emotion painting
Playful - Emotion painting
Flirty - Emotion painting
Angry - Emotion painting
Sad - Emotion painting
Focused - Math diagram painting
Inspired - Framed Book object
Tense - Low "Fun" need (can easily be gotten by choosing to work hard at work, too, but then you've got to go to work, which eats up time)
Uncomfortable - Low "Bladder" need (should also work with Hunger, Energy, or Hygiene)
Bored - Use same conversation option three times in a row
Embarrassed - Get rejected for a romantic conversation option
Energized - Drink coffee
Dazed - Drink more coffee
Asleep - Go to sleep. Yep. You need to do this. I actually had to do it at the start and end of the set of emotions.