Some common business English phrasal verbs that use "on". 

Get on = (1) have a good relationship with someone: "She gets on well with the Accounts Director" 

= (2) to progress: "How are you getting on with the launch?" 

Take on = employ people: "We aren't taking on any more staff this year." 

Go on = continue: "Please go on. I'd like to hear more about your plans for the new office." 

Sit on = to stall or delay something: "We proposed this some time ago, but the Chairman has been sitting on the plans and we're no further forward." 

Build on = use your successes to go further: "They built on their early success and soon expanded to become the biggest catering firm in the South East." 

Crack on = work fast: "I'm sorry I can't stop and talk – I need to crack on with some work." 

Work on = use your influence with someone: "Leave it with me – I'll work on the boss over the next fortnight." 

Pick on = bully: "She feels that her colleagues are picking on her because she is so popular with management." 

Decide on = choose: "What colour have you decided on for the staff canteen?" 

Hold on = wait: "Please hold on and I will see if Mr Harris is available." 

Pass on = give a message to someone: "I'll pass your message on to her when she returns." 

Try on = test someone's authority: "Don't take any notice of his behaviour – he's just trying it on with you!"