Bob's your uncle - something that you say after you have explained how to do something, to emphasize that it will be simple and successful. Example - "Yousimplyputon thestainremover,leaveitforanhourandBob'syouruncle,thestain'sgone."
Horses for courses - it is important to choose suitable people for particular activities because everyone has different skills. Example - Ah well,horsesforcourses.Justbecause a plumbercanmendyourwashingmachine, it doesn'tfollowthat he canmendyourcar as well.
Swings and roundabouts - something that you say to describe a situation in which there are as many advantages as there are problems. Example - "If you make more money, you will have to pay more taxes. So, it's swings and roundabouts, really."
To drive home - to make clear by special emphasis and try to convince somebody of something; drive home a point or an argument. Example - "I'm trying to drive home these basic ideas"
Takeaway - a key fact, point or idea to be remembered. Example - "The main takeaway for me is that we need to continue to communicate all the things we're doing for our customers"