The Three Currencies that You Have
You have three currencies. They are money, time and knowledge. If you are short of money, you can spent time and knowledge to acquire it. If you are short of knowledge, you can spent time and money to acquire it. If you are short of time, you can spent money and knowledge to acquire it.
If you are short of any of the two? You should focus on acquiring time first as it is a non-renewal resource. Then knowledge and finally money.
If you are short of three? I don't know what circumstances you would be short of three.
Source: Something that I read on the Internet.