Dot your i’s and cross your t’s
Definition 1 of 1
Pro Tip 1/3Detail Oriented
The phrase implies being meticulous and thorough in your work. 
For your science project, dot your i’s and cross your t’s to ensure accuracy.
Pro Tip 2/3Final Checks
It's often used as a reminder for last-minute reviews before finalizing something. 
Dot your i's and cross your t's before submitting your application.
Pro Tip 3/3Professional Attitude
The phrase suggests a professional approach, paying attention to what might seem trivial but is important. 
A good accountant will dot their i’s and cross their t’s.