It’s a problem we all face on the course. How to get aligned properly and to know that you have aligned yourself correctly.
For me it all becomes part of the pre shot routine, but only if practised correctly.
I like to practice my routine and set up a lot. I practice on the range and even in the house.
The first thing to do is to have an intermediate spot on the ground in front of the ball to indicate the ball to target line.
In the video I placed a yellow ball in front, but another peg tee will do when practising.
Next lay a club shaft or cane on the ball to target line. This will make it easier to get the foot line parallel which I mark out with another cane or club.
Remove the cane from the ball to target line and go through your full pre shot routine. Remember to play a shot here, just exactly like you are on the course.
I was practising draws, so I set up slightly closed and started the ball right of the intermediate target.
Always be playing shots, not golf swings!