Are there other ways to make a magnet float ?

Yes, there are other methods of making a magnet float.

Floating a magnet is one way to indicate that a substance has become super-conductive. A super-conductive substance provides absolutely no electrical resistance. When a magnet is brought nearby, an electrical current is generated in the superconductor. This electrical current will generate an electromagnetic field of it's own, and always opposing the original magnet. As the magnet comes closer the reverse field becomes stronger, and eventually it will float on the repelling field.
Since this process has no losses, the magnet will float for as long as the super-conductivity remains.

Another way is by utilizing the repulsion between similar poles of two magnets.
The trick is to prevent the floating magnet from flipping over and attracting the base magnet. The Levitron, from Edmund Scientific, spins the floating magnet like a top. The gyroscopic forces keep it from flipping until the rotation becomes too slow, which can take many minutes.

There are also "floating globes".
These devices float a hollow Iron sphere below an electromagnet. There is a sensor, usually optical, that continuously adjusts the power supplied to the electromagnet to maintain a constant float height.
The sphere will float for as long as adequate power is supplied.