Inhale, exhale.
Sing to the small dot in your head.
Keep your diaphragm expanded.
Your body is your cello. Use the space for resonance.
Keep your throat dilated.
Small breaths for long notes.
Constant vibrato, but no shaking.
Approach the high notes from on top.
Consistency of technique.
...
Empathize, but not too much.
Reveal, but don't show off.
Control of heart.

What?

Empathize with your own story
Applied to the music you sing.
Reveal the love, the pain, the laughter, the rage, the angst.
But don't let it go wild.

No one likes a show off.

Singing:
All about consistency.
Singing:
All about control.