1. Pre-production. That means being very, very well-prepared. Know your material as well as you possibly can.
2. Be well-rested and do not eat or consume any dairy products before your session.
3. Be well-hydrated. Drink lots of water in the preceding 6-8 hours. This hydrates your vocal folds.
4. Prepare your sound. Prepare by recording yourself ahead of time and listening back. By now you probably understand that your voice sounds strangely like some other person when you hear it played back from an outside source. This is normal but understandably odd to you.
You are hearing yourself with, of course, your own ears. They are located inches away from, and directly connected to, the source of the sound, your lungs and mouth and so on. You are the only person who hears the sound that you hear when you sing - through the bones and tissue of your own physiology.
The rest of the world hears what you hear when you hear a recording of yourself played back on a good
system. So use this as a tool. If you don’t like
what you hear on playback, make a change
your voice to try to achieve the sound you
were aiming for. Then record again
immediately then listen back to see if the
physical changes you made to your
voice made a difference. This is a
tremendous tool for your toolkit.