I would say it's up to you really...you can just as easily fold some tightly in a piece of paper/whatever and heat it up in an oven to press it....or tape it like mad and stick it in your shoe for about 10-15 min. Of course a press will probably make the process easier...and if you have a vice and torch you can hold it in the vice and use the torch to heat up the hash to "melt" it together, but you gotta be careful of the temps so you don't overheat it...or you can choose to JUST press it, and not heat it up.