There are an infinite amount of mixtures. Anything you can combine is a mixture. Think of everything you eat. Just think about how many cakes there are. Each of those cakes is made up of a different mixture.
Solutions are also mixtures.
If you put salt into a glass of water, it is considered to be a mixture. You can always tell a mixture because each of the substances can be separated form the group by different physical ways. You can always get the salt out of saltwater by boiling the water away. Two classic examples of mixtures are concrete and salt water. You can see them both being made everyday.