There’s four ways that I get tasks into OmniFocus.
The Omni Group gives each OmniFocus account a private email address that you can send messages to get a task in your Inbox. I’ll do this by forwarding to the OmniFocus task I created in Gmail.
The great thing about this that the body of the email appears in the notes section of the task and it provides me a link back to the email message.
From anywhere on my computer, I can hit control-option-space (which is a keyboard combination I defined) and a small window appears and I can enter just the task, or I can enter the task, assign it to a project, set a due date and more.
Typically, I just enter the task and move to the correct project later.
This is another defined keyboard shortcut, and this one will take any highlighted text and turn it into a task.
It’s really useful when you want to save a URL for use later.
Reminders / Siri
The last way to add items to OmniFocus is with a combination of Siri / Reminders. If I tell Siri to “Remind me to…” it will add to my built in Reminders app, but also push it into OmniFocus. It’s extremely useful when driving or if I want to set a reminde on my watch.