What are the most useful phrasal verbs to learn?

Answer 1

I would find an English grammar book with a list of phrasal verbs. There are hundreds of them, but hopefully a good book would have a list of 20-30 that are most useful. Maybe have a native speaker look at a list and point out the ones he or she uses most.

Answer 2

The most useful phrasal verbs to learn may be the ones that are used the most, or they may be those that significantly change the meaning of the verb which could lead to misunderstanding if used incorrectly. High usage phrasal verbs might be the difference between "look at" and "look for (also "looking forward to"), those with "go," and those with "get." Seriously, they are probably all important.