One of the biggest issues I'm seeing with new users is proper bed levelling. Most guides only use the paper method, but that's usually not accurate enough, especially for beginners.
Printing squares in each corner is much more reliable and you can get near perfect first layer after printing a batch or two. This is especially useful with manual levelling beds, but it also works great if you have a 3D printer with automatic bed levelling.
*Octoprint CR-10 leveling plugin*
* Printable models *
Mini Trash Can:
Calibration squares (various sizes):
* Get in touch *