I like to share thing with you guys, this time I bring a great snippet (Via @fmontes).
"The purpose of this HTML is to help determine what default settings are with CSS and to make sure that all possible HTML Elements are included in this HTML so as to not miss any possible Elements when designing a site."
I highly recommend to save this snippet just for test purpose (headings, p, a, buttons, etc.) Is a great idea. I hope you like it