What does the word "mazel tov" mean?

It means “Congratulations” or “Good Luck” among Jewish people. You may watch “Munich” movie for the better understanding of the same as this word has been often used in the movie.

Example of “Mazel Tov” used in sentence:

Golda Meir: Your wife is pregnant?

Avner: Yes, seven months.

Golda Meir: Mazel tov. 

Link: Here

How can I embrace solitude and focus on studying?

Studying is a tough thing buddy. Who does that and seriously who cares? You should not make your life tough.

It's easy to party hard.
It's easy to be in bed for a long stretch of time.
It's easy to just use your phone and think that you are cool.
It's easy to like Bill Gates’s tweet about success and tag your friend in any meme.
It's easy to blame politicians for the condition of the nation and trend any hashtag on social platforms.
It's easy to just like, love, tweet, retweet and comment
It's easy to watch Friends, Breaking Bad, Sherlock, Sheldon and MTV stuff.
It's easy to browse Amazon and Flipkart for hours just to pick a right pair of shoes or clothing.
It's easy to judge. It's easy to be in the audience. Why you want to be in the ring when you can just enjoy your fries and popcorn watching others fighting for the glory.

Why you want to be in the top 1 % of the population who are working so hard day in and out?

Don’t be someone in the crowd. Don’t be someone in the audience. Don’t be just someone. You have your own identity. You have your own vision. You have to make this world a better place. You don’t need to waste your life. You need to learn things. You need to study. You need to go to conferences you have never been before. You have to study books that you have never read before. You have to listen to the speeches you have never heard before. You have to watch lectures you have never watched before. You are special. You need to make this life special for your children to come, parents who have worked hard to meet your needs and your friends who were with you in your hard times. You need to work today.
While other guys sleeping, you need to study.
While other guys eating, you need to study.
While other guys partying hard, you need to study.

Because ultimately wisdom and skill is something that is going to make you special. You shouldn’t embrace solitude. You must. There is no way around. Else you better know what’s easy to do. :p

Hope it helps.
Thanks.

Link : Here