The best alternatives to religious belief are to rely on logic, reason, secular science, rationality and critical thinking.
Everybody has these tools, they just need to exercise them by questioning assumptions, not believing everything they hear from authority figures, and cultivating their own creativity, curiosity and independent spirit.
Human beings have an innate sense of morality. Almost every normal person is born with a basic sense of fairness, right/ wrong and respect. In free societies, where children are not brainwashed by a rigid ideology or religion, this moral sense is allowed to grow and flourish naturally.
Between our basic instincts for right and wrong, and our rational faculties for knowledge, we have all the tools we need for happiness and prosperity.
In other words, we do not need religion or ideology. We need only the heart and the mind.