If your daily workflow revolves around sending and receiving scores of emails, and your or your business' preferred email client is none other than Gmail, then you might be interested in checking out Boomerang for Gmail.

If you haven't already heard about it, Boomerang for Gmail is a cross-browser extension (available for Firefox, Chrome, and Opera) and one of the best email productivity tools and definitely, a must have for every user who's keen on keeping "email life" as well-organized as possible.

Specifically, Boomerang for Gmail can help write and schedule emails to be sent automatically exactly when you need to in the future, postpone incoming messages and make them visible at just the right time at the top of your Inbox list, not to mention set reminders and alerts in case you don't get a reply to various emails within a predefined timeline.

We're going to focus expressly on Boomerang for Gmail for Opera, even though, it must be said, the extension is pretty much the same on all three major browsers out there. That said, start off by deploying the extension on your browser from the Opera official add-ons store.

It almost goes without saying that you will have to provide the extension with access to your Gmail details, which brings us to the next point: you need a Google account in order to use this extension. If you're inclined to opt for the paid plans, then you'll need to activate a Boomerang account, as well.

The most obvious sign of Boomerang's integration with Gmail can be perceived in the Compose section, thanks to a "Send Later" button. Compose your email choose from the Send Later menu the exact send time, it's that simple.

You can also use Boomerang for Gmail to track responses. This can be accomplished by clicking the checkbox, right next to the Send Later button. Select the desired timeframe from the menu or add a custom one at which the email should be returned in your Inbox if you don't hear back from the recipient.

Setting the so-called reminders is just as simple, simply open the email you want to check back on, and click the Boomerang button and choose the desired option from the set of common send times or input the exact time.

Having said all that, it's quite easy to comprehend just how big of an asset Boomerang can be for businesses or individuals who are dealing with lots of emails on a daily basis. Not only does this extension provide you with probably the best reminder for Gmail but it's also extremely useful when it comes to project management-related tasks.