I used an old telescoping antena and tore it apart so i had all teh sizes out. then I slightly squished the ends a bit so when i put them in and twist and then pull on the wire they pop out perfectly. Thought of that idea way back before I had tools. Thats for the molexes.
As for the atx used staples and then got tools but now i just repin them all since most likely i would be changing the colour of the connector anyways and resizing every wire.