[lasagnaphil]

No, if you're just an owner. If you're a miner though... that's a whole different story.

[eric-hu]

Not a miner but I’m curious. What should miners be doing differently?

[fogof]

I don't think there's anything miners really have to do differently because of this. The only big thing would be to make sure to upgrade your software to the version that has the code for the hard fork (though at this point the hard fork has already happened, so you would be a bit late). But regular users should upgrade their hardware too so that their clients track the correct chain, otherwise they might not see the right balance.

[Fiahil]

Update their running software.

[drdrey]

Upgrading their nodes

[thebean11]

sudo apt upgrade geth

[moralestapia]

If you have ETH but not use any wallet, should you do something?

[everfree]

No.