You will now start line training and here the pressure will mount and real life events can place more stress on you than those in the sim. There is no magic cure for dealing with the stress that will come but may I make the following suggestions:
1. Don't drag the past with you. If you foul up, so what. We all do. Leave it behind. Get on with the next job.
2. Before it happens, think what the next job is and prepare for it. And the one following etc. All the time your priorities should change.
3. Before committing yourself, consider what you wouldn't like to happen - like a last minute runway change for example. How will you deal with that?
4. If you look like you are getting high on profile, or low on speed on the approach - take some bloody action early. Then small changes will be required instead of HUGE ones. Don't let yourself get painted into a corner.
5. Have a rough idea where you are. What will be your MSA in ten minutes time? If you have to divert or land quickly, where will you go?
This isn't an exhaustive list nor is it the definitive one, but it might help. And well done on passing your test.