Identify Your Need
In order to learn a language, you first must identify your "felt need" for having that language skill. By "felt need" I mean, What is it in your life that causes you to feel the need to speak that language?
It could be that you need to be able to speak to someone you love like a new girlfriend or boyfriend. Or you may have married into a family that speaks another language and when you are with them you experience that "felt need" to learn that language.
It could even be as simple as needing it to get a degree from a school that teaches in that language or needing to buy food in a country you have moved to where everyone else speaks your language, but when you go to buy food, you are at a loss to communicate.
These areas are your "felt need" for the language and when you have specifically identified them, you are more able to find the motivation to learn. Now, take that "felt need" and turn it into a goal.
A goal must state specifically what you want to do and when you want to achieve it. You may need to break a big goal into smaller goals.
Let's say your "felt need" is to be able to shop for groceries using the language you hope to acquire, then your goal would be to study pictures of the food and be able to name them. And your time line to achieve it may be by the next time you go to the market.
This is just one of the goals that you can set, but by setting goals like this that are specific to your "felt need" you will achieve what you want in no