calling all HAIR mixologists

I am having a hankering to do my own products...I don't know something about purchasing products that really won't do much to my hair just bothers me, lol. I mean I will always be a contributor to boosting the economy with my conditioner and various oils purchases (still love you Hairveda lol), but not to sure about anything else (at least not full price). Do any of you have any blends you mind sharing? Or your holy grail of all oils or butters?