Nanpa, this is a pretty broad question but the answer would be do what you have the best exposure to. If you're still in undergrad, find a lab at your school that will teach you about lab-work and provide opportunities to do some solid research. This might lead to an abstract, poster, or publication. Maybe talk to a professor you've created a rapport with during class or ask an advisor if they know of PIs who are willing to take in students.
If you're out of school, this method may still work, but there are more opportunities (along with more time) to devote energy to. Academic hospitals are probably the next best thing doing basic or clinical research. Ultimately, find something you think you can exert yourself in and get something out of it, either more knowledge or hopefully achieve some sort of recognition for your work.