Your job takes up an extremely large amount of your time, and choosing one is therefore not a decision to be taken lightly. If you are currently working but are thinking about moving into another job, you need to think critically about this decision: Do you want to move into a higher-paid job, regardless of what it is; or do you want to move into a job that provides more day-to-day stimulation but may not necessarily pay as much as your current job? What's more, how much less money would you be prepared to take?
These are all critical thinking questions that encourage you to think about what you actually want and what you are prepared to do to get it.
Travelling is not an activity with fixed costs. Indeed, travelling can range from very cheap camping in a nearby state or national park to an extremely expensive multi-week trip to a foreign country. When you are making travel plans you should think critically about what you can afford and what you want -- do you want to save money more than you want to sleep in a comfortable bed? Tent travelling is cheap, but it is not as comfortable or easy as more-expensive rented accommodations. To solve this problem, you should think critically about what is important to you and what is not.
Education -- particularly higher education -- is another area that requires critical thinking. An engineering graduate will have a profoundly different job than, say, a history graduate.
Since education is expensive, you should make sure you choose a course or set of courses that makes this money worth it, as going back is both time-consuming and financially taxing. So, you should look at what's important to you -- is money important to you, or do you just want a higher level of knowledge in a topic you find interesting? Or are you, like most people, somewhere in the middle, and if so which way do you "lean?" Critically thinking about who you are and what you want can help you make this important decision more effectively.
No matter what you do, you are going to feel a variety of emotions every day. Some days will have more heightened emotions than others as you encounter different stimuli. Anger, for example, is sometimes rational but sometimes it is not. A constant critical thinking problem everyone needs to solve on a regular basis is "Why do I feel this way?" By asking yourself this and reflecting on your own emotions you can control your actions and channel your emotions toward the stimuli that caused them rather than toward other stimuli that simply happened to get in your way.