<strong>ToDoist</strong> - So awesome and cross platform. IOS/Android/WINDOWS!!
And for the entrepreneur, you can not go wrong with <strong>RightNote</strong>. Rightnote is the end all and be all of me. Everything that's crossed my mind, has been documented in hierarchical form in RightNote and is available to me via an Evernote integration. It looks ghetto but its exactly what I need for my brain.
If you're a Windows user, it's to your advantage to check out Right Note which is a hierarchical note taking software.
My brain is a shitty information manager and RightNote has fixed that for me.
So when I remember stuff now, I don't need to remember the actual factoid, I just need to remember WHERE IT IS in the information hierarchy that I've created in RightNote. After I look it up enough it eventually sticks in the brain.