A lot of my projects use development boards that have 25 mil square wire-wrap pins on a 0.1" grid. I like to insert these into a perf board and then use good-old 20th Century wire-wrap to connect them up. It's quick, easy to fix errors, and easy to dismantle to re-use the boards in other projects.
Solderless breadboards are also great for quick projects, but don't expect them to stay intact if you have cats :-)
Of course, many of us have a deep-seated belief that you can never have enough tools.
I frequenly will have two or more of the same type of tool. I was recently asked if I had a staple gun and when I replied that I had two (a manual and electric), my non technical friend just cracked up laughing. I didn't see the humour.