Pro-tip: On DigitalOcean, sometimes you run out of memory when running steemd and you might be tempted to expand the RAM of the droplet. There one thing you can try before bumping up the RAM. DigitalOcean recommends against it, but that's because they want you to pay them for the RAM. Instead, you can create a temporary swap volume. They don't like it because it puts more wear and tear on their SSD. To activate swap, do these commands in the shell:

sudo dd if=/dev/zero of=/var/swap.img bs=1024k count=4000
sudo mkswap /var/swap.img
sudo swapon /var/swap.img