Add the _drafts folder to your site root. Use it to save posts you don't want published yet.
Posts that do not follow the format YYYY-MM-DD-post-title-format.md will not be uploaded, or shared on live site.
When you have posts that do not have a date on the file name, save them to the drafts folder. When you are ready to add them to your site, just click on the add-dates.bat file and it will automatically add todays date on the file name and move them to the _posts folder for you.