There is the resources aspect, the technical know-how and understanding, and the education on why it is important. At least in Bitcoin Core, we can work on the first one or two.

I think an important aspect of work on Bitcoin Core itself is about minimizing resource needs to do IBD and run a node (and also improving documentation where needed) to help more people do that. Another is working to make the nodes run more robustly and help users' understanding. See this WIP article for an example: https://jonatack.github.io/articles/using-alternative-p2p-networks-with-bitcoin-core