1) I accidentally added too much salt to the soup and ended up messing up the entire batch.

2) Be careful not to mess up the important presentation by forgetting your notes.

3) Sarah managed to mess up her chances of getting a promotion by showing up late to work multiple times.

4) Please don't mess up the order this time, we need it to be perfect for the client.

5) I really hope I don't mess up my audition for the school play tomorrow.

6) It's easy to mess up a DIY project if you don't follow the instructions carefully.

7) Jill's attempt to fix the leaky faucet only made things worse and she ended up messing it up even more.

8) I didn't mean to mess up your phone settings, it was an accident.

9) I messed up my schedule and double-booked myself for two important meetings.

10) If you don't want to mess up your chances of passing the exam, make sure to study thoroughly.

11) Here are some example sentences using the word 'mess up':

12) I accidentally spilled coffee on my shirt and messed up my presentation.

13) Don't let your nerves mess up your chances of success.

14) I need to fix my hair, I really messed it up this morning.