After a long day out harvesting in the terminal block fields, we've returned with a veritable bounty of these very nice and compact terminal blocks in a variety of sizes.

Our harvest of terminal blocks is great news since nothing makes a project harder to maintain than a lot of loose wiring.  That's why we like to use terminal blocks whenever making PCB-to-wire connections.  These don't fit well into solderless breadboards since the legs are not very long, and they don't snap together or fit side-by-side on a 0.1" grid - but that's okay since we've got a bunch of sizes to choose from.
 
These terminal blocks are also big enough for a range of wire gauges and easy to adjust with a screwdriver.  They're not too chunky - so won't take up too much space on your protoboard - and found them pretty ideal for projects where you need a specific number of pins.