Whether they realise it or not, individuals who believe their consciousness will go on after death behave differently and value life differently from those who believe otherwise. The 19 men of supreme and absolute faith who immolated themselves and thousands of others a decade ago might be the most graphic examples. To gentler souls the alternative is accepting that you will one day lose everything. Everything you have and everyone you love, including yourself, and you will cease to exist. All that really matters, then, is the here and now, how you live your life and how you treat your fellow travellers along the way. After all, they're going to lose everything, too. If for no other reason, you should be compassionate toward them.
Belief in an afterlife is a balm against irrational despair but it also blinds its adherents to how precious little time they actually have. Those who believe they will go on after death have an abundance mentality while those who perceive the boundedness of their existence have a scarcity mentality, and each will have a tendency to conduct his or her life accordingly.
I guess I'm back.