Add all of the herbs and spices to a bowl or large plate.
Mix well to combine everything.
Transfer to an air-tight jar.
Notes
For best results, buy ready ground spices. You can use a pestle and mortar to finely grind them, but a blender wouldn't work very well.
Make sure you have a jar big enough to store the seasoning blend.
It's best to mix everything in a bowl and then transfer it to a jar rather than trying to shake it in a jar. Whilst that might save on washing up, if the jar is very full there will not be enough room in it to get everything mixed together.