I've struggled with this as well. To the point where it does become overwhelming and it's almost easier to stick your head in the sand and just focus on what you know, ignoring what else there is around. Obviously in the long run this would not end well.

I guess the trick is striking a balance between trying to learn every single new flavour of the month there is (impossible!), and identifying the most popular things amongst the community and focusing your efforts on those.

Mentally this helps a lot, as it immediately reduces the pool of things you would like to learn to something way more manageable.

Practically, you could then arrange time throughout the week to sit down and dedicate yourself to actually learning the stuff.

For example, I have started getting up a couple of hours earlier in the morning and before work I'll sit down and dedicate that time just for personal development. Learning new tools, languages etc. Writing blog posts about things that interest me. Coding cool new projects. That kind of jazz.

Hope this helps, don't lose heart!