Texturing really blurry when on model

im having trouble with texturing in blender i have followed videos on you tube an i havent come across anything that solves the problem i do model in blender render an bake as normal but still have trouble can anyone point me in the right direction to solve this issue please.

In short: Scale up the blurry faces in the UV space.

I’m not expert on this but I believe you need to look more into something called Texel Density. Check this video (Even though he explains on Maya, principal is same for Blender):

Also check this very detailed PDF:

And check this addon for Blender: Texel Density Checker