Best position to jelq in?

What position would be good to jelq in? Standing up, sitting down or laying flat?

I do the whole routine standing up. But the finishing BC muscle workout I do laying down

I believe standing up. Laying flat on your back seems to help blood drain from your penis which is not what you want to do.

Stay upright for as long as you can afterwards as well.

Any position is fine.

Whichever position you can do it in at the time!

However some provide an advantage like mentioned above. Laying down and blood will drain.. However if you are getting a rock hard erection then laying down might be what you need.