Keep your knowledge about your current framework up to date. When there is a new version of Java, C#/.NET, ASP, Azure services announcements, read them! This can be a short summary, in text or on YouTube (there are tons of those), or you can read through the changelog, that is up to you. But at least skim through them to determine if there is anything interesting for you worth taking the time for.
Keep track of your area of expertise. If this is Azure, Big data in AWS, cross-platform mobile development, it is important to keep up to date with the specific products that you use, but keep in mind that there is more in the world than only that. This feels like a lot to process, but we will get back to that in the “how?” part. The investment here would of course be less than in other places.
Try something new now and then. As said, every now and then there is something new that should change the world. However, more often than not, it doesn’t have the impact that we’d like it to have. However, after some time we see something stick in the real world instead of only as a concept, and then it is well worth the time to take a look.