Master's online??

I'm not sure if this is the best place to post this so if any of you feel this would be better posted in another area, please let me know.

I am starting to research into online Master's Programs. Has anyone received their Master's Diploma online and if so, what credentials should I look for in a school? Any tips? I have taken online courses before and it is a great educational resource for me since I have kids at home and work as well, but I am hesitant because I'm not sure too much about what is important to look for in a program.

Any help would be greatly appreciated.

Thanks!
Wendy