Getting started in DIY can be an intimidating thing. There seems like a lot to know and there's so much information available that it is easy to get lost and overwhelmed. The following links are collected together to help bring all the information you need to get started into one place. And remember, if you need help or something stumps you, just ask! We were all there at one point; chances are someone has had the same question and knows the answer.
Getting Started in DIY Guides
Wikivapia page for DIY e-liquid
@PIXXIEPUFFS Intro to DIY Video
A beginner’s journey into DiY entirely, and starting with Mixing By Weight
Flavors and Other Resources
Great Beginner's Flavor Choices - sorted by company
ELR Resources Page - A great place for learning abbreviations, tips and tricks, where to buy, etc.
If you could only pick 8 Flavors thread - A good thread for picking beginner flavors
DIY Flavor Must Haves - Another great thread where people have shared their 'must have' flavors
HiC’s Recipe Flavor Breakdown - Known for great recipes, HiC's list is good for picking flavors, especially from FlavourArt
Thread for 'Starter Kits' Suggestions - Work in Progress, but good ideas to get started with DIY gear
Nicotine and Flavoring Prices - A few places to get nicotine and flavors with prices
Fruit Flavor Combinations - A quick look at what pairs well with certain fruit flavors
Flavor Pairing - An in-depth look at flavor pairing through molecular gastronomy
More flavor pairing discussed on this forum!
DIY — The Vapers Table - An Australian-based site with excellent information (for everyone!) on DIY as well as hardware and all aspects of vaping
Vape Town UK has a nice intro to vaping.
Smokefree.gov is the US government's page. It does contain some useful info.
Wikivapia's page for how to use ELR
Definite Don’ts in DIY thread - Some great info from those who have been doing this awhile
A Great Recipe Creation Rundown by @LordVapor
DIY E-liquid Safety - Nicotine is poison! Remember to be safe when handling anything containing nicotine, and keep it and supplies away from pets and children.
Thanks to @daath, @NewDrip and the gang here for helping gather this information and making it available!