Thinking is one of your senses like smelling, tasting, touching, hearing and seeing. You can engage a thought, ignore it or reject it. Thoughts are not yours until you take them and you do not have to take them.

Doing is now. You cannot change what you did even one millisecond in the past and you can only plan (imagine) what you will do in the future. You can only do in the now.

Events are not good or bad until you decide. If you receive $1000 or get a flat tire, it can be a good or bad event, depending on your perception. Receiving  $1000 may make a vacation possible or it may put you over the income limits to receive a benefit for which  you have applied. A flat tire may cause you to miss being in an accident that occurs or meet a special person that stops to help you. So do not judge an event immediately based on your past experiences.

Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;
2 Corinthians 10:5