That's pretty much about it in a nutshell. Whether you're running a modern electronic ignition or a vintage points system, the aftermarket has plenty to offer. Don't skimp, regardless of which camp you favor, at least if decent performance is what you're after. And no matter what, continually keep tabs on the condition of not only your plugs and wires, but also your cap, rotor, contact points or HEI module, and coil (internal, external, or whatever it may be that's receiving the 12 volts from the battery to begin with). It's far too easy to get lazy in this department; just like it may be when it comes time to change your oil and filter...don't be lax!
Just as you have a wide variety of spark plugs to choose from (which we'll get to in a bit), you also have an array of plug wire options. And while the "bigger is better" axiom still holds true in most cases, as shown with MSD's 8.5mm Super Conductor wires, ACCEL has recently gone the opposite route with their 5mm ThunderSport wires! | 
For the purists who might want a Packard-style OE application, but with added performance aspects, Pertronix offers their 7mm Stock Look plug wires in pre-cut and cut-to-fit kits. | 
Regardless of what type of wires or plugs you use, maintenance and upkeep are key to maintaining a properly functioning ignition. However, during inspection, take extra precaution not to create problems yourself, like this--pulling too hard on a stuck boot can often have negative results. |
With that in mind, using a cheap tool such as this (along with a little coercing by rotating the boot back and forth on the plug to "un-stick" it) can help avoid damaging plug wire ends. But if you find yourself in a broken situation, it's nice to be prepared to address it. | 
There are different styles of crimps, but in essence, they're all achieved in the same manner...well, pretty much, as you're about to see. | 
Making terminal ends on plugs wires, be it repair or simply building a set from a cut-to-fit/universal kit, can be done with the simplest of vise-attachment tools all the way up to elaborate hand-held tools. It just depends on your preference...and your budget, obviously. |
The first thing you want to do before making an end is peel back the plug wire's insulation housing and expose enough of the core wire to be folded back and crimped under the end (for dual-crimp applications, the wire is not folded--it gets secured with the second crimp). Here a "pencil sharpener" type device from Mallory does the trick. | 
MSD's all-in-one vise crimper is designed with markings to gauge where to cut the housing with a razor blade. With spiral-wound cores, be extra careful not to remove the actual spiral winding during the process. | 
After trimming, you just slide the terminal over the wire (with the exposed core folded back and sandwiched between), insert both into the plastic crimper with the open end of the terminal aligned in the proper position, and simply tighten the vise until both sides of the crimper fully compressed. |