Job control is probably my favorite thing about Linux. I find myself, often, starting a computationally demanding process that basically renders a computer unusable for up to days at a time, and being thankful that there is always
fg, in case I need to use that particular computer during that particular time period.
Sometimes, however, I want to insert a job onto the job stack. I've never figured out how to do that.
It would probably look something like:
$ ./reallybigjob ^Z + Stopped reallybigjob $ (stuff I dunno) && ./otherbigjob $ fg