Contextualizing your research topic in the wider field can help make your literature search more efficient.
Is your topic well established in your field, or quite specialized?
Try a discipline specific database, such as arXiv.org, Project Euclid, or MathSciNet.
Is your topic relatively new or interdisciplinary?
Stick to a multidisciplinary database.
Keep up to date in a relaxed way:
For access to e-books, online journals, databases: