Getting at least 10-15 minutes of sunlight every other day can greatly increase your vitamin D levels. However, don’t overdo it because excessive exposure to UV radiation can increase your risk of skin cancer.

Alternatively, you could also use UV light but the risks still remain. 

A simple thank you is also a solid option when you want to express gratitude. But, like thank you in advance, it can convey a tone of expectation. Save it for when you really want to imply, "I hope you do this."

You can't outrun a bad diet. If you're not getting the results you want, maybe it's because you need to take a look at the foods you're eating. Your personal trainer is meant to help you achieve your goals, but you need to do most of the work yourself.

To get the most out of a personal trainer, you need to evaluate your goals and adjust your diet accordingly. If you want to lose weight, you need to eat at a calorie deficit. If you want to build muscle, you should be incorporating more protein into your diet.

If you eat right and stay on track, you will be getting maximum efficacy out of your personal trainer and your hard work will start to pay off.

There's a pretty common misconception that you should distract yourself and make sure that you don't have the free time to think about whatever is bothering you. Does that give you momentary happiness? Yes. Definitely. However, this is extremely tasking for your emotional well-being. For actual progress and healing, you need to grief properly before you're able to move away. Either you take it in small doses over the course of the next year (or more than a few years even), or deal with it immediately and get back on your feet in a few days.

During the introduction, you may often face questions like, “Walk me through your resume” or “Tell me about yourself.” That’s your cue to give them a short introduction about yourself. Most people make the mistake of simply repeating what’s on the CV. You want to take a more conversational approach here. Add something unique such as any interesting hobby, or history. Keep the job position in mind and speak in line of that. 

Depression cannot go away in a day or two. It is a serious problem and it may take longer than you imagine. Depression can stay with people for years even when they are constantly on medications and undergoing therapy.

Give the person time to heal. Don’t judge them or blame them at all. They might spend a really good day with you and feel depressed the next day. This is because depression has very deep roots and even when it goes away, they may feel depressed from time to time.