before purchasing the spool or the amount you need, definately look at the colos on the individual wires to see how bright they are. some come in extremely nice bright colors while other colors are almost transluscent, which can be a pita when it comes to putting them into the plug.
also you want a tester so you can make sure all the connections made it through
you also might want to find the fire retardent cable, i think its called plenum cable instead of running conduit
make sure you follow one of the standards - either 568A or 568B, i think 568A is better for in walls and such - these standards help with distances and how the wires are wound around each other and the electrical current going through them - there is a method to the way it is done. this will reduce crosstalk - in category 5E cable is to significantly reduce the crosstalk, and it's effects or interference - just don't put the wires in the plug in any random order, there are standards and they are there for a reason - especially on the longer runs.
just out of curiosty how long do you need it? i have a long "patch" cable i made that i would be more than willing to send you for the price of shipping. a buddy of mine gave me a spool - there is a lot of wire in it, not sure exactly how much, and i ran a pretty long patch cable before i had a laptop and wifi. i can't remember if i did it in A or B but i could have a look at it. it is the solid core wire.
i would offer you what i have but the colors on it are more of the tansluscent and kind of a pita, but if you want some, tell me how much you need and i will see if i have enough if the patch cable is not long enough. the cable i have is here -
Belden Website and then put in 1585A in the upper left search box, then you will have all the specs.