Once you have identified your Research Question generate a list of words, or Keywords that are related to your topic. For example, your question, coffee shops and college campuses. The keywords related to your topic:
"Internet communications" and "cafes" and coffee shops and "colleges or universities" and marketing and blogs, etc...
"coffee shops" and marketing
Once you have identified your topic, check to see if it is too specific, if it is, work toward a general focus. This will help you generate a list of keywords, or concepts related to your topic.
travel, tourism, e-commerce, "mobile devices", smartphones, United States,vacations, digital travel, etc....
Use AND, OR, NOT to connect your phrases/keywords
to locate both smartphones AND travel
to locate either word U.S. OR United States
to locate (the first word) vacation NOT trip
* truncation symbol
travel* travels, travelers, traveling, traveled
Here are a few databases to begin your research: