In this short video Bob Reynolds explains How to soak reeds. Everything is there: from the white paper trick over to rubbing the grains back into reed and how to position the reed in the glass during the soaking process. I myself wasn’t familiar with the latter. Well worth a minute or so of your time.
As a bonus I’d recommend having a look at the break-in and maintenance recommendations for saxophone reeds on Alexander Superial’s site. It’s similar and I had good results with this routine.
But I will now go and get me a pint.