To take full advantage of your breadboard, you'll need to have plenty of wires that can jump between the holes and make electrical connections. These bundles of premium wires come in two lengths, about 3" (75mm) and about 6" (150mm). The lengths aren't exact but between the two you'll have plenty of short and long options.

Each version comes in a 'strip' of 20 (2 pieces of each of ten rainbow colors). They have 0.1" male header contacts on either end and fit cleanly next to each other on standard-pitch 0.1" (2.54mm) breadboards. The best part is they come in a 20-pin ribbon cable. You can always pull the ribbon wires off to make individual jumpers, or keep them together to make neatly organized wire harnesses.

Here's an example of a fairly complex wiring setup possible with the jumpers. Note that some wires are indiviual and some, like the brown/red/orange/yellow set are still together to make the wiring a little neater.