I get blue paint on my white ceiling, how do I return with rid of it?

I painted my room about a year ago, I have paint stains I get on the ceiling and outlets that I never cleanedoff and I want to try to fix it now (I know I should have taken contemplation of it then) but I'm not sure what to do. If anyone has any suggestions, that would really help me out because my room looks ridiculous beside all the blue paint stains on the white ceilings and white outlets. Thanks!
Answers:    you will own to prime and paint the ceiling. As far as the outlets the plates, plugs and switches are dirt cheep. That is if you are comfortable with electricity. covers and such are less than a dollar apiece
You can paint over it beside more white paint prime the area a few times and use a couple of coats of white paint...