There are so many great tools and strategies, but almost all of them require you to have a person or even a team to support it - for example all social media automation tools require you to prepare a lot of content to be effective. I can't do that.
Do you know any great tools that are more or less 0 maintenance, relatively short setup and deliver value?
It doesn't have to necessary be marketing tool, but it's what made me curious. If you know of development, accounting or whatever other tool please shoot!