Easy, very easy!
1) Put your trim into a blender with water and ice, about twice as much water to ice ratio (you don't want it to turn into a slushy)
2) Blend it for several minutes on high until it mixes completely and breaks off the trichomes
3) Strain your mix through a kitchen strainer to get rid of the big plant material
4) Strain that mix through a gold coffee filter into a large bowl (preferably glass so you can see the trichomes settle) and then place in the refrigerator
5) Let the mixture sit for an hour or so
6) Look at the bottom and you will see a milky mix that has fallen to the bottom of the bowl (The trichomes are heavier than water so they will sink)
7) Remove any loose debris and try to syphon off as much water as you can
Strain through any type of paper coffee filter
9) Press to get rid of any unwanted moisture
* I put my finished hash in the freezer because it will get moldy very easily. All I do after that is take a sharp knife and scrape off some hass, being frozen it can be sliced off easily
If you need more then just Google "Blender Hash", there are some people out there with pictures!
It is VERY easy!