I'll share an even better approach that works across all devices, allows better todo management and allows you to preserve the original email context.
The first thing you need to know is that an email sent to username+anything@gmail.com is the same as sending it to username@gmail.com. Knowing that you can send all your notes to username+todo@gmail.com and then create a filter to attach a Yellow "TODO" label for any such emails received. You can send yourself reminders from anywhere. You may want to add your "todo" in your address book for convenience.
You can also reply to any email that needs attention and change the recipient to username+todo@gmail.com. If you add a short summary in the first line of the body, it will show in your inbox preview. That email will sit in your inbox vying for your attention and when you open it, you can always refer to the original thread. It's also possible to expand this idea further. For example, you can reply to an existing todo email and add more details. You can also keep a draft email within the same thread where you have rough notes. I have drafts that are a year old attached to todo items. You can mark items complete fairly easily as well. You should have GMail keyboard shortcuts enabled if you don't already.
On a related note, you can also sync your iPhone notes to keep them on GMail. That works out nicely as you always have them backed up online and you can have read-only access to them from anywhere through your GMail account.
I haven't needed anything more for my todo management.
The first thing you need to know is that an email sent to username+anything@gmail.com is the same as sending it to username@gmail.com. Knowing that you can send all your notes to username+todo@gmail.com and then create a filter to attach a Yellow "TODO" label for any such emails received. You can send yourself reminders from anywhere. You may want to add your "todo" in your address book for convenience.
You can also reply to any email that needs attention and change the recipient to username+todo@gmail.com. If you add a short summary in the first line of the body, it will show in your inbox preview. That email will sit in your inbox vying for your attention and when you open it, you can always refer to the original thread. It's also possible to expand this idea further. For example, you can reply to an existing todo email and add more details. You can also keep a draft email within the same thread where you have rough notes. I have drafts that are a year old attached to todo items. You can mark items complete fairly easily as well. You should have GMail keyboard shortcuts enabled if you don't already.
On a related note, you can also sync your iPhone notes to keep them on GMail. That works out nicely as you always have them backed up online and you can have read-only access to them from anywhere through your GMail account.
I haven't needed anything more for my todo management.