Before i go to PCB, i usually do a lot of breadboard prototyping. Breadboards are very easy and flexible to use. Nevertheless, a few more tricks to make their use even easier, would never harm anyone. Here are some nice ideas for those who use a lot of breadboard prototyping, found in 43oh.
Adding a coin battery to your breadboard. Two pieces of double row connectors (headers) will do the job just fine!
Here is a simple way to have LEDs with resistors prepares to be inserted on single row headers
You need short jumpers? Staples will do just fine!
A sticker on the chip with the ports is a great idea! It will save time for sure, and in many occasions, the chip itself (from wrong pin connections)
Paper clips makes very good connectors for your breadboard wires.