Note down
Definition 1 of 1
Pro Tip 1/3Remembering Details
Used when you need to remember specific information or details that may be forgotten otherwise. 
I'll note down the serial numbers for future reference.
Pro Tip 2/3Studying Tool
Effective for studying; writing things down can help with memorization and understanding. 
Note down the key points from the lecture to review later.
Pro Tip 3/3Action-Oriented
Indicates an immediate action of recording information, not just the intention to do it later. 
As soon as the professor mentions the date, note it down quickly.