18. Say "yes" to everyone. Fill all your time with commitments.
It's good to be busy, but not overwhelming so (e.g., Mark 6:31). This one is connected to the next point.
19. Try to be everyone's friend.
Jesus had enemies; so much so that they killed Him. No one is a friend to everyone. Luke 6:26 - "Woe to you when all men speak well of you, for so did their fathers to the false prophets."
20. Never spend any time alone.
Sometimes it is good to be alone, to decompress, so to speak. Life can be stressful and sometimes some quiet time to be alone and reflect is exactly what we need. Perhaps it is a quiet commute home; perhaps it is prayer time alone with God. Jesus spoke of this in Matthew 6:6 - "When you pray, go into your room, and when you have shut your door, pray to your Father who is in the secret place; and your Father who sees in secret will reward you openly."
21. Don't help others unless you have to. Do only the things that benefit you directly.
Self-centeredness is a sure-fire way to be unhappy. The ever-challenging solution is in Philippians 2:3,4 - "Let nothing be done through selfish ambition or conceit, but in lowliness of mind let each esteem others better than himself. Let each of you look out not only for his own interests, but also for the interests of others."
22. Hang out with people who complain about everything.
Don't think that they won't affect you. Spending lots of time with sourpusses will turn you into one. I Corinthians 15:33 - "Do not be deceived: 'Evil company corrupts good habits.'"
23. Take everything and everyone in life seriously; always be solemn.
Friends, it is good for you to smile and laugh as often as possible and where appropriate. It just makes life better! Proverbs 17:22 - "A merry heart does good, like medicine, but a broken spirit dries the bones."
24. Spend your life working in a career field you aren't passionate about.
When you give 8 or more hours a day and 40 or more hours a week to something, you're giving a huge portion of time (i.e., your very life) to it. If you cannot learn to enjoy it, you should pursue another line of work.
25. Focus only on your problems.
Every human being has blessings and struggles, but we choose our mental focus. If we concentrate on the good things in life, the bad things won't bring us down so easily. As a man thinks in his heart, so he is (cf. Prov. 23:7).
26. Think about all the things you don't have.
Count your blessings; name them one by one. It will surprise you what the Lord has done! Paul declared in Philippians 4:12 - "I know how to be abased, and I know how to abound. Everywhere and in all things I have learned both to be full and to be hungry, both to abound and suffer need."
27. Set lofty goals for yourself and never do anything to achieve them.
This too is foolishness. You can achieve whatever you really put your mind to accomplish. It takes discipline and continued effort to achieve goals, but doing such is great for our mental health.
28. Never exercise and overeat regularly to stay fat.
A little self-control at the dinner table and some degree of regular exercise will do great things for your body. I Timothy 4:8 - "For bodily exercise profits a little, but godliness is profitable for all things."
29. Set up your lifestyle so it revolves around money.
Money isn't bad, but it can be used that way. If all your money is directed toward self and family, you have a problem. God expects you to do good with your resources (e.g., teach the lost, help the needy, etc.)! I Timothy 6:17-19 - "Command those who are rich in this present age not to be haughty, nor to trust in uncertain riches but in the living God, who gives us richly all things to enjoy. Let them do good, that they be rich in good works, ready to give, willing to share, storing up for themselves a good foundation for the time to come, that they may lay hold on eternal life."