Attend a course organized by a professional provider. In French Polynesia enroll through the annual training scheme provided by the Vice-rectorate, DGEE & University
Attend online education conferences, workshops, or webinars. For example The British Council provides webinars.
Enroll in online courses! You will find MOOCs dealing with education on many learning platforms such as FUN and Coursera. Have a look at the "online courses" page.
An excellent resource to carry out your professional development! Decide who you want to follow!
Network with other teachers, on FB there are a lot of private groups especially made for teachers.
Les Cahiers pédagogiques, n°548 focuses on online teacher groups. Have a look at my article: Collectifs enseignants et formation initiale, aux antipodes ?
Subscribe to newsletters: Eduscol, Lettre EduNum, outilstice.com, Edutopia, Ludomag...
Use an RSS reader or a news aggregation app to access web feeds published by websites. Instead of visiting multiple sites, just use a feed reader to aggregrate and curate content.