pick up
Separable
Lift something, or collect someone
I will pick you up at eight.
Learn something casually
She picked up some Spanish on holiday.
Separable
The object can go between the verb and the particle: turn the light off, or turn off the light. When the object is a pronoun it must go in the middle: turn it off, never turn off it.
Practise it
Add it to your daily practice or see every verb with up.
Further reading: pick up on Wiktionary (CC BY-SA).