Expectation inevitably creates Disappointment:

How does one create future
frustration for oneself? By expecting!!!
Ooh May I enjoy such and such form in the future.
Ooh May I delight in this and that feeling in the future.
Ooh May I experience exactly these lovely things in the future.
Ooh May I receive my beloved favourite experiences in the future.
Ooh May I relish
only
in those mental states, that I like in the future.
Ooh May I be satisfied by solely favourite sorts of consciousness in future.
Ooh May I Not meet this or that disliked person, event, circumstance, etc...

On the contrary: One is always content if without any expectations:
Let the past be past, passed and forgotten, for never to return to it again!
Let forms, feelings, experiences, hopes & mind here & now be as they may!
Let whatever arise & cease! Relinquishing all hoping and wishing for whatever
future forms, feelings, experiences, constructions & types of consciousness:
May I
just
remain aware, calm, clear, content and therefore unagitated!
Let it be, as it may!
Let it come, as it comes!
Let it go, as it goes!
Good is contentment
with just what one has,
with just what there is!

More on calm satisfied Contentment:
http://What-Buddha-Said.net/drops/II/Contentment.htm
http://What-Buddha-Said.net/drops/IV/Calm_and_Content.htm
http://What-Buddha-Said.net/drops/IV/Cause_of_Contentment.htm

Source: The Grouped Sayings by the
Buddha. Samyutta Nikāya III 11-12
http://www.pariyatti.com/book.cgi?prod_id=948507
http://www.accesstoinsight.org/canon/samyutta/index.html
