There is no such thing as an experienced meditator. Every breath must be as if it is the first, every step a fresh event. A beginner's mind leads to a sense of gratitude for everything, whether or not the desires of my ego have been granted or life is going smoothly. A grateful heart for the rushing currents as well as for the still pools puts the ego in its place. This attitude that grows out of increased awareness does not come easily in the face of difficulties, but it is worth cultivating over a lifetime.
Gratitude is the most fruitful way of deepening your consciousness that you are not an "accident", but a divine choice. It is important to realize how often we have had chances to be grateful and not have used them. When someone is kind to us, when an event turns out well, when a problem is solved, a relationship restored, a wound healed, these are very concrete reasons to offer thanks.
What fascinates me so much is that every time we decide to be grateful, it will be easier to see new things to be grateful for. Gratitude begets gratitude, just as love begets love.