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Alton Brown has tons of good info beyond recipes. Mainline Good Eats. Cook's Illustrated is great--they often do it wrong to demonstrate why the right way is the right way. My parents got me a culinary school textbook that is full of insights. My gazpacho and pesto recipes are directly from this book.
A fun exercise is to try to replicate something. We went to New Orleans and had their grilled oysters. No such thing at home, so we got the $1 oyster special from Whole Foods and went nuts finding recipes that we liked, trying, and modifying them.
I lived in Chile for a few years, and it was a bit challenging. I am forever in debt to the mover who packed all of my spices in a box labeled "VCR". Produce is amazing, but it's super hard to find a lot of ingredients so if you want stuff you have to make it. I made Swedish meatballs from scratch (a panade is key), gyros, bagels, naan, gulab jamun, and more.
Maybe set one day a week or every other week for you to work on a cooking project. Recipe development/replication, new skill, etc. The more you do it the better you'll get :)
Buy a textbook like Gisslen. It gives a lot of the information you won't find in a typical recipe book and a lot of techniques/recipes you can build off and make your own.