There is a lot of great software out there that can make your life so much easier. Here is a list of online services we use ourselves and can thoroughly recommend.
Freshbooks is a very powerful invoicing system which makes accounting easy and gives your invoices a professional look. With Freshbooks you will be on top of things at all times from wherever you are.
Dropbox allows you to synchronise your files with multiple computers and mobile devices. You can also access your files online or share folders with several people to work together easily.
Evernote (available for Desktop, iPhone, iPad, Google Android) a great application that provides an excellent solution to manage notes and snippets of information. All your information is automatically synchronised with your devices.
Assistly pulls all your customer service conversations: mail and social media channels like Facebook, Twitter & Co.into one collaborative desktop. The requests get collected and can then be prioritized and handled by your whole team.
Doodle makes finding a free date for your next meeting very easy. Just send out a your available dates allowing everyone to choose the appointment they would like.
PayPal offers a secure and convenient way to pay or get paid online. Just send out an email with your invoice and your customer will be able to pay you immediately through their PayPal account or credit card.
Mailchimp, a brilliant email campaign app, makes it easy to send out newsletters and other important information to your customers.
SurveryGizmo is the most advanced online survey software out there to get all the data you need for better and deeper insight.
Skype is the ultimate communication tool, especially if you have clients all over the world.