How to change a mindset

Talk and ask a question, probe the limits of understanding and expand them. 

How to sound intelligent when you talk or write

Use as many words as you can in each sentence and be descriptive. Get a word of the day calendar or app and use it five times each day to improve your vocabulary. 

Opening a bottle of beer without an opener

Use a spoon, lighter or counter edge to leverage off the cap. 

How to autodidact and learn anything

Choose your desired topic,, any topic. Google it with "basics" and look up the definitions of all the words you don't know in the Cambridge dictionary on several high rated blogs and then transition to a textbook and do all the assignments and Google the answers to score your progress. Then you can even transition to beginner and then intermediate and then advanced. 

How to open a jam jar

Run hot water over the lid so the metal expands and then it's easier to unscrew. Or bang the lid on a table to loosen it. 

How to pick out jewellery

Think about your goal in life, does it require elegance, poise, mystery or flawlessness? Choose jewellery to match! Otherwise you're inadvertently letting yourself down. 

how to give good advice

Listen and encourage talking until a problem is exposed. Then agree with their attempted solution and improve it based on science.