I did this without realizing it would be much more helpful than just [11am Do New Habit].
I haven't been following through on my new habit lately, but I feel bad dismissing that plea from my would-be better self.
It's really, really difficult to start a healthy habit so do not worry when you aren't perfect!
If you can, make it a habit that you do first thing in the morning so there are minimal obstacles that could throw you off.
Do not try to start more than one habit at a time!
Best of luck!