A lot of time we give up on something. And the reasons may be few.
We were way optimistic about the time we need to set aside.
This habit was not so important to us.
We got distracted, which indicates a lack of skills to prioritise the most important thing.
And lastly, this might have not been so important for us.
Choose your excuse, or better yet, don't and just do it or find something else that you can really progress towards.