How to become more consistent at getting the right coordination?

There are days where I can quickly get the coordination of singing. No/little tension, open throat, proper support, a connected top and bottom range. And there’s days when I can’t. Maybe if I sang for couple hours everything would connect. I think I struggle with tongue tension even when I’m not speaking. Any tips to keep myself more consistent would help. I’m just a hobbyist but trying to improve.