In a previous post, I suggested you think of your ASP.NET Core application as a command line tool you can use to execute application specific tasks. In an even earlier post, I suggested you keep scripts related to development checked into source control. I think you can see now how these two posts work together to make everyday development tasks automated and easy.
The command line renaissance gives us a wide range of tools we can use to speed up .NET Core development. Here are some of the tools I've been using recently, in no particular order:
Various dotnet global tools, including dotnet-cake, dotnet-t4, and dotnet-rimraf
The Chocolatey package manager