For underground conduit... I find that using compressed air is better than a vaccum.
We use trailer air compressors... but you can easily pick up a CO2 tank from the local welding place, and get a string/duct compression fitting (see hiline catalog for some good ones) that put enough pressure on it.
Blowing out conduit underground is better because it'll shoot all of the mud and dirt out on the other side that's built up after backfill if it's been a while.
A neat thing to do is take your buttset, and reverse the side the clip is on, lets you attach it to your belt so that you can actually dial and leave it on your belt, because the numbers face out.
When using a toner, remember that if you short out the two conductors, the tone should completely stop -- allowing you to make sure you have the right pair or cable, rather than another cable that has induced tone.
Putting springs on either side of your cable caddy will allow your reel to bounce around and move more freely when reaching the sides of the roll, if that makes sense.
With larger cables, such as pulling 50 pair or above, it's wise to put large springs (I prefer to make them out of CATV hardline) on both sides, makes pulling a lot easier.
Last but not least...
Whenever terminating Cat5, trying pushing the pair (this depends on the type of jack) over the seperator from the tip and ring. This will allow you to keep the twist up to the termination, and also prevent you from spending so much time untwisting each pair. Works great with 110 blocks especially.