There are so many different brands and types of nutes out there it can be overwhelming. What I personally did was I lurked like hell on this site for several months before I ever posted. Read/follow some of the more successful grow journals here. As I spent time reading I soon recognized a few members who REALLY have their shit together and have consistently produced amazing grows. Those are the guys I started focusing on, following their threads, eventually asking them questions, etc. PLUS, you have to do some experimenting on your own too, and find out what works for your particular application. I DEFINITELY do NOT have it perfected and I know I never will find that ultimate combination -- but I'm growing MUCH better than I was before, so I'm going in the right direction.
No one has the perfect solution because perfection is unattainable -- no matter how good you get at this there will always be someone out there who can teach you more. It's a never-ending road, so just enjoy the ride and try to pick up tidbits of useful info and new ideas as you travel along. As long as YOU are happy with the fruits of your labor, then it's all good!!!