A lot of helpful tips you can try out to gain control over your time. This is such a short yet powerful idea: "Your time is valuable. Your calendar determines how you invest it." Also, create habits and systems you'll actually use, otherwise your brain won't really let go: "The more you trust your systems, the more they’ll work for you and you can jump into the right things only at the right time instead of having to react to forgotten items or deal with issues when you didn’t plan to."