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...
search keywords:
"coffee shops" and marketing
Advance Keywords search:
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: