General Resources
Some dangerous dogmas about modding that you should be aware of.
An introduction to xEdit and its use.
A full guide to The Method conflict resolution.
SSE Resources
The official Creation Kit tutorials.
A series of modding tutorials.
General information on LOD and how to regenerate it with SSELODgen, DynDOLOD, and other tools.
A complete guide on generating new grass cache and LOD.
All you need to know about ESL plugins and how to flag your load order ESL in batch.
A huge wiki on everything to know about LOD and the tools involved.