On tact Focus more on the actions that should be taken rather than the action that shouldn't. Your approach in many a situation is to call out someone for their wrong action which only serves to make them defensive and emotionally charged about the situation as a whole. That does not serve to make them change their action in any meaningful way. If, however, you learn how to suggest and facilitate their own discovery of what you know to be true, then they will subscribe to it on their own and make their own lasting efforts to live up to their own beliefs. Learn also to be agreeable even when you completely disagree with someone. Disagreement does not have to turn into dispute. It takes great tact and skill to avoid that, but it can and should be done. Sometimes, if you know that by disagreeing you will only cause a dispute and harden someone's heart against you, then you should stay silent and not express your opposing viewpoint at all. This is not to say that your opinion doesn't matter or that you should censor yourself, but that you will accomplish the opposite of what you intend to accomplish and should refrain from that at all costs.
On memory You cannot possibly expect yourself to remember all of the things that you learn, whether that be through reading, hearing, or living. It is impossible to remember it all, even with extensive note-taking, documentation, and systems to help you. You should not experience distress over this fact, but take solace in that the most valuable information will simply "stick." You won't forget it because it will make a significant impression on you that will last a long time. Perhaps you will read entire books only to walk away with one sentence that is of any significance—good. That one sentence is the one that truly mattered. This is not to say you should abandon all systems of note-taking or documentation, because those are an important part of the learning process for now and later, but don't stress yourself out by trying to capture any and all information that may become relevant at a later date. Your effort is futile, and the insights will make themselves readily apparent to you when the time is right. Have faith in this.
On framing Your actions must be consistently framed by the purpose that you wish to fulfill. Rather than complete tasks on a daily basis simply to complete them, ask yourself, how did those tasks serve my larger purpose in life? This frame makes your day-to-day action both less significant and more significant at the same time. You might say that your current writing practice is significant because it is a big task that you take time to fulfill daily, but if your actions are correctly framed, you should realize that your daily writing is only a tiny part of you reaching your much larger vision of helping others and disseminating helpful knowledge and thinking. Have clear passion to fulfill your purpose, because it is the only way that you will persevere when the going gets tough and you no longer enjoy the comforts of praise and affirmation of others for what you do. Without proper framing, you are painting a nonexistent picture that means nothing—a canvas that can be easily and swiftly abandoned.