Someone here said something about good support helping reach pitch which has helped tremendously. Quick question

This just resonated in a way that made sense to me and now while I'm regulating the amount of air I'm releasing, phrasing is so much easier and I can end the phrase with proper support instead of running out of steam. Now, I know this is really about being relaxed and sometimes being hyper aware of mouth/tongue positioning can actually hinder yourself but what other little tips like this may help? I tend to hold my throat in a position that it's as open as possible at all times...is that incorrect?