I had a problem for a long time, my joints were loose as FUCK.
Till i learned something. The dollar bill method never worked for me, so i found a way that was simpler and faster.
After you roll your joint just place it in between your hands and roll up and down. This evens out the weed a bit more and tightens it. My joints only run occasionaly, and do so much less often than before. Makes a really good smoke.