You want to migrate your community to Discourse? Awesome! As daunting as it may seem, it has been done a good number of times and so we have some tips, guides and documentation to help you get started, I will link to them all in this root guide.
First off an explainer of how the migration documentation for Discourse on Meta is currently structured.
Questions
If you have a question on migration, there is a chance it has already been asked, you can find FAQs (frequently asked questions) on migration here: Latest migration topics in support - Discourse Meta. Feel free to search these topics here: 
migration question. If your question hasn’t been asked, click here to ask your question here: Ask migration question
Guides
We have guides on migrating from popular platforms like:
- Vanilla
- vBulletin 3 and vBulletin 4
- Xenforo
- Mailing lists (Google groups, mbox, Listserv, emails, … )
- bbPress
- MyBB
- and a host of other guides
All migration / import guides can be seen here: Latest migration topics in developers - Discourse Meta, so if you are looking to find a migration guide for your specific platform, be sure to check there or search: migration guides
Prep guides
There are other guides that help in the general migration process in other categories, I’ll list them below for easy access:
- Preparing for and undertaking a platform migration - community - Discourse Meta
- Pre-launch platform migration questionnaire - howto / admins - Discourse Meta
- Setting up Discourse import / migration environment on DigitalOcean droplet - howto / admins - Discourse Meta
If you are looking for other migration topics not mentioned or referenced here, you can always use search to find them: other migration topics
Import scripts
Asides the guides, we also have import scripts for different platforms, some of which do not yet have a guide, you can find these import scripts here: discourse/script/import_scripts at master · discourse/discourse (github.com). We also have a bulk importer feature:
Migration training
You’ve gone through the links above and still find migrating daunting? Don’t worry, we have a step by step guide you can follow to ramp up your migration skills. It would require a good understanding of server administration, script writing and data wrangling/management. If you have these skills, then feel free to take on this training and share your progress as you go.
Link to migration training topic - may be coming soon