It's easy to roll the perfect joint every time with RAW Cones.
6 packs cost about $2.50
They come with 6 cones with cardboard "filters" to keep anything from pulling through. Also included are 3 handy cardboard tubes that are perfect for packing the cones as you fill them.
Grind up some herb, and dump it onto a paper plate
Paper plates are actually perfect for this, as they can easily fold in order to collect the herb in a nice pile.
Scoop up some herb with the cone, and lightly pack it
Repeat as necessary
2 or 3 more times should do the trick. This is after the second pack... once more to top it off will be perfect.
Twist it up!
Give it a little twist at the end to keep it from loosening up. I also like to keep them in little tubes, so that I can toss them in my pocket or bag without worrying about damaging them.