There's a big issue that many men (and women) face today. It's what I'd simply describe as not following your instinct.
When we are children, when we are young and not indoctrinated, and while our brains are not fully developed yet, we follow our instincts. It isn't always good, and we learn from our mistakes. But we innately trust what our instinct tells us. We want to do something, we do it. The vast majority of adults deviate away from this behavior, mostly because societal norms deviate away from what some of our basic instincts tell us to do, and in the process, we learn to not trust our instincts, and instead filter them through a process of rationalizing.
This is all fine and good, and even necessary for society to prosper. But it corrupts us in other ways. Let me explain via hypothetical:
You wake up every morning at 6am to brush your teeth. It becomes habit. You wake up, you know it's time to brush your teeth, you do it. Your brain sends signal "brush teeth" and you follow. One day, you wake up, you feel lazy, your brain sends "brush teeth signal" and you rationalize that you don't need to brush your teeth because skipping it for one morning will not affect you in the long run. You may not necessarily build a habit of not brushing your teeth, but you have taught yourself that the signal your brain sends you is not always to be trusted, and that you can deviate away from it. Doing this occasionally causes little to no harm, but when you continuously do so in every activity you do, it builds a negative feedback loop of trust.
Just as "brush your teeth" in the morning is a signal we follow (and most of us don't try to rationalize away), not waking up to an alarm you set is exactly the same. You tell your brain that a decision you made yesterday is not to be trusted. Thoughts of "talk to the cute girl" and "go to the gym" apply also, you tell yourself that while the thought did occur to you, after some rationalizing, you disagree with it.
To come to the core of the issue, all this rationalizing away from signals of things we "should do" or "want to do" makes us not trust ourselves. When you are free to listen to every signal your brain gives you and don't doubt it, you not only free your working memory of constant anxiety that you may be making the wrong decision, you also build a foundation of self esteem and trust in yourself. This is the foundation of what PUA lingo refers to as "Inner Game".
There is a reason that men who appear "unsure" and "not confident" and "insecure" are very, very unattractive. The only way to be secure and confident in yourself is to truly trust yourself and have a healthy mental image of yourself. While this has many components in it, doubting yourself and allowing yourself to deviate from activities due to procrastination is one way that you chip away at your core self image.
Think of your ideal image of an "alpha male" or "successful male", or just who you want to be (the best version of yourself). Do you think they constantly doubt their own thoughts? Why/why not?
Bad practice is bad, period. Rationalizing away signals and previous decisions leads to internalizing self doubt.
Final takeaway/TL;DR: Stop allowing yourself to doubt your brain signals or your decisions. If you decided to set your alarm to 4am, don't hit snooze, you're undermining the importance of your own decision making. If you see a cute girl and think "I should approach", don't let yourself rationalize any further, trust yourself and just do it. It'll liberate you from anxiety and make you more confident.