I don't think doing multiple commits a day in GitHub should be a goal. It's just not the focus - otherwise you would write one line of code and then commit to GitHub saying "added line 234 in AnyOneFile.code".
In addition, aren't you wasting your time committing your code to GitHub 20 times a day, if you could update everything just 5 times a day.
Your goal should be adding a major feature in so and so days. For example, one of my goals was to implement match-making for my Android board game "Surakarta" in one day.
Sorry if my post was a bit discouraging.