Most of my research has been for dealing with kids that have trauma backgrounds, and there are different things you do there.
I will say that I've found the Love & Logic series less terrible than most of the mainstream stuff, and you'll likely be able to find a local class, which (assuming you're not a single parent) can be huge on getting you on the same page with your significant-other. That made a big difference for me, as my wife and I were raised very differently.
A few snippets of advice:
* Operant Conditioning[2] works both ways: your child's behavior will affect you, and you will subconsciously avoid things that are distressing to you. Not taking this into account can cause a lot of problems.
* One thing at a time. e.g. don't potty train and teach table manners at the same time. Partly because it's harder on the kids, but mainly to prevent burnout for the parents.
* Focus primarily on having a positive relationship (versus a lot of training & discipline) with kids under about 2. It seems likely that Martha Sears[1] went overboard, but there is definitely some phenomena like "attachment." (Also, Attachment Parenting, Attachment therapy and Attachment-based therapy are all different things, and the terminology is not always agreed upon)
1: https://en.wikipedia.org/wiki/Attachment_parenting
2: https://en.wikipedia.org/wiki/Operant_conditioning