Hi Teresa:
Early in my career (when I was much younger and didn't know better), I awarded EC pretty regularly.
What I do now is create ownership and a partnership, as this is how good businesses succeed. On day one, when I review the syllabus, I point out there is no extra credit. Then, I spend time telling how each stduent can get an "A" in the class if they follow my instructions. Nothing magical, just an understanding of expectations, such as:
* TODAY, do one small thing towards getting that project done, even if it's not due for weeks… >>>