The reason I use so many is that I feel like I need the extra help to just get even a bit beyond what the average person does naturally :).
: Charges me money if I don't do something X times per week or month. This is how I stay on top of blog posts, guest posts, gym, etc.
: Treats my life like a video game. I use it to keep on top of daily and weekly routines.
: Commits money to longer term goals. I only use this very rarely as I'd rather focus on process than results.
: The best todo app I've found.. I've tried a lot.
: How take the headache out of scheduling with clients and contacts with busy schedules across different timezones.
This is what I listen to while I'm working (sometimes with binaural beats in the background). I'm not quite convinced with the science, but it does seem to help me focus.
: I use the pomodoro technique to stay focused, because if I don't take breaks I find I burn out quickly.. This helps me stay on top of my timers, as well as see where my time is going.
: will block distracting sites when I spend too much time on them during work hours. There's also Leechblock for chrome, as well Rescuetime for every browser.
: Hooks in with my phone, email, and social networks, and reminds me to contact people if it's been to long.
: Let's me keep on top of news items about my network
: Used to keep track of my clients and teams between meetings., Gives them a simple way to record what they got done that day.
I also make heavy use of zapier to make sure everything gets recorded in Beeminder and HabitRPG.