11:11 is a combination I see all the time, sometimes it happens several times a day on clocks, odometres, microwaves etc, sometimes I dont see it for days or weeks. My sister has the same thing.
At one stage i would see it and then something bad or unlucky would happen. Not too bad but not good either.
I now take it as a kind of sign, like that little voice inside your head that you should listen too, I say "thank you" as if I am saying thanks to a Guardian angel or something - sounds weird I know but since I have been doing that nothing bad has happened.
I really believe in paying attention to the little signs around you and listening to the little voice, 9 times out of 10 its right - well for me anyway.