I do not have personal experience with every person/site/service recommended here. However, I do believe them all to be useful and trustworthy.
100 Best Websites for Writers (2017 edition)
Great Goodreads Groups
Great Facebook Groups
Editing and Proofreading
Website and Blog Design
Blog Tour Hosting
Please feel free to contact me and request that your service/business be added to the list. I’m always looking to build up my resources page!