Sharepoint Workflow: Where to store configuration settings?

I am currently writing a Sharepoint Workflow that is activated when a user saves an Excel file to a Library. Now I need to process this file and store certain information to a certain list. Whats the best way to store configuration settings like the name of the output list, names of the Excel columns that the Workflow needs to process, etc?

I understand that there seem to be a lot of different possible solutions like web config, Properties, etc. But since I am totally new to Sharepoint, I cannot properly assess these methods. Which one is the easiest for me to use?

Thank you.

Edit: A Visual Studio Workflow, 开发者_开发问答written in C#

This article is a good starting point Six Ways to to store settings in SharePoint but personally I would be following the MSDN SharePoint Guidance Library which uses the Property Bag storage for their implementation of a hierarchical Configuration Manager which allows you to do things like a farm wide setting but overridden for certain site collections/sites/lists etc.