Long form tutorials can be found here: https://www.sidefx.com/profile/Partikel/
Quicktips and stuff here: https://vimeo.com/partikel
Recorded presentations can be found here: http://partikel.co/resources.html
Patreon with files can be found here: https://www.patreon.com/partikel
Pluralsight course: https://www.pluralsight.com/courses/houdini-vfx-games