Assess your level of preparedness before starting. Choose a topic that interests you.
Check that the research is original or that it approaches the topic from a unique point of view. It will help you get an overview of the subject - and check the bibliography!
Take into account practical matters such as the availability of the material (laboratories, equipment, documentation) and the time available.
Defining the topic
Brainstorm the topic you want to work on.
Write simple sentences that describe the topic.
Underline the important words in each sentence.
Think of three themes that also describe the topic: synonyms and similar concepts, abbreviations, acronyms, etc.
Look for words that have a broader or more specific meaning: you have nothing to lose!
Translate all the terms you have come up with into other languages that you can read. Think of some published topics, mostly in English!
To sort everything out, it may be helpful to create a conceptual map similar to this example.