Take every night as a new one, and learn not to expect anything!!!!
If you have a baby that consistenly sleeps through the night before 12mnths, I'd be ecstatic!!! But remember, things change... teething, colds, illness, growth spurts, weather... can all have an impact on changing a babies sleeping pattern.
Yay for a good nights sleep!!!!!
(My youngest is 2.5yrs old, eldest is 5yrs, and I haven't slept through the night consistently for over 5yrs.... you get used to it!!)