Announce your intentions

This is one of those rare tricks that you want to say what you're about to do, BEFORE you actually do it. Many magic tricks depend on the element of surprise. However, the Balducci Levitation happens fast, you want them to be looking at your feet.

Also, if they're EXPECTING your feet to raise off the ground, they're more likely to assume that BOTH feet come off the ground when you do the levitation because that's what you SAID you were going to do! It's a weird kind of psychological misdirection, but it's effective.
1. Find your spot

By looking around for a good spot to levitate from, you do two things. First, you cause a false suspicion that the ground has something to do with the trick. Any time you can distract someone from the real secret it's a good thing.

Second, it gives you an excuse to be turned away from the audience (10:30/11 o'clock). You don't usually perform magic tricks with your back turned, so you will need a reason to turn your back on someone. Looking for a spot gives you that "out".
2. Make it appear difficult

People who believe in levitation believe that there is a kind of inner energy, or "chi", that can make people float. If that were the case, it probably wouldn't be easy. Otherwise, everyone would be doing floating themselves!

Also, if it were easy, why wouldn't you just float up into the sky? You need a good reason for only being able to lift a few inches off the ground. The fact that it is difficult and physically draining to make yourself float, gives you the needed excuse.
3. Wear pants

While it's possible to do this effect in shorts, the video thoroughly expains why it's better to wear longer pants. Just look at the difference in how my right foot looks as I'm floating! It's much better with pants, right?
4. "Hover"

Things that really float look very "airy" and "buoyant". You don't want this trick to look mechanical. As you're floating, slightly bounce up and down gently as if you were bobbing in the ocean. You could even "twist" a little. (If you go up on your left foot, twist slightly to the right and vice versa.)
5. Land hard/stumble

By landing hard, you give the impression that you were floating yourself much higher than you actually were.

By stumbling, you reinforce the idea that it is very difficult and draining to perform the effect. That way, no one will ask you to do it again! This is definitely a trick that you don't want to repeat for the same spectators.

ONE LAST TIP: If you want to make BOTH feet come off the ground

hey thanx for those tips.

Yes.

I do this trick all the time, it's quite easy.

It's also best if you are in a corner or so.
Thanks for the tips.

good tips but give us an example of some excuses