To widen your vocabulary at B1 level
1- download the B1 Preliminary vocabulary list here
2- for each topic area, on your notebook organise & re-write the words under the following categories
- new words to learn
- words I need to use more while speaking/writing
- words I often make spelling/pronunciation mistakes with
Each section must have a heading, which is related to the topic area the terms refer to, and a wordlist, which must be written in a neat and legible handwriting.
In case of necessity, you can use an online dictionary such as dictionary.cambridge.org to check spelling, pronunciation, meaning.
3- memorise the words