This is a curated list of the tools and services I strongly recommend for improving your efficiency and career. I have tested every recommendation on this page. Many of the resources listed here are crucial to my career (or I would not be in the place I am today without them)
Todoist is one of the tools that I use every day. It is an essential part of my daily routine. I use Todoist to keep track all actions or tasks that I must do and to organize them based on project or context. I evaluated dozens of to-do applications each with their own advantages and disadvantages. I decided to use Todoist because of its simplicity and for the massive community behind it. The ecosystem around it is very impressive. It is very easy to find integrations for almost every other tool or app that I use (e.g. Outlook, Trello, Alexa, etc.). The two-way sync with google calendar helps me with my weekly and monthly planning. The karma system makes me accountable and drives me to push my GTD limits.
Evernote is the one of the best note storing applications. It makes it so easy to drop any information and persist it over years and years. I save in it official documents, meeting notes, email templates and many more. Anytime I need to go back review a topic or do some research I use Evernote. The amount of accumulated knowledge in this tool makes it very easy to get the answer I need. I use tags and notebooks to organize my notes. Since a couple of mounts, I write my weekly goals here and store also my work journal.
Trello is one of the most popular applications for organizing ideas, projects or almost anything you can think of. It has excellent flexibility and also a huge community that has extended the tool to a new level. For me, Trello is the place where I store all my yearly goals and distribute them on a monthly basis. Also, when I come with a new idea or an opportunity presents itself I will add it here. Similar to todoist, Trello has numerous integrations, and it is easy to find ways to combine it with other tools in your repertoire.
Spark is one of the best email clients in the macOS ecosystem. The ability to send emails later or to snooze them it is a must-have for me. I check emails only once, maximum twice per day so when I open Spark, I already find all my work mail and personal emails grouped and organized. Quick reply it is another feature that I tend to use quite frequently since it forces me to have an answer that fits into one sentence.