When you're trying to find information, there are several other ways to say "look up." To search for something online, you can use phrases like "research," "explore," or "investigate." If you're looking for a word in a book or dictionary, you can say "consult," "reference," or "peruse." To try to locate someone or something, you could use phrases like "hunt down," "track," or "pursue." And if you're trying to improve your mood, you might say you're going to "brighten up," "cheer up," or "lift your spirits." There are many other phrases you can use, depending on the specific context and what you're trying to achieve.