Which are the best ways to avoid disappointment in your life?

[Jonny]

Not expect for anything for anyone, its my opinion. if any one suggest your opinion.

[Bhavya]

Not expect for anything for anyone, its my opinion. if any one suggest your opinion.

You are right, expectation surely leads to disappointment. Help others without any expectation and don't expect anything from others, do your work by your own then you can easily avoid disappointment.