If it's working for you, don't worry about it.

That said, I made heavy use of the stamina stuff when I had low stamina (I've been to enough shrines now to have gotten it up to a respectable level) and the stuff that gives more hearts (or defense/attack buffs) when I'm getting ready to go for a big fight. I sell the stealth and speed stuff...and I cook that stuff because it sells for more rupees that I can use on Great Fairies or new armor or whatever.