Get to the cloud. I've had no issues with cloud software, I also like the trial options offered and the ability to turn off the subscription if I'm not using it.
Get an online presence. Google is your friend and potentially a referrer of clients, so is Facebook. An online presence can help you interact with your customers and build your business following. You may need to invest a bit more in marketing but you'll be happy from the extra attention, feedback and sales.
Payment systems are now mobile. You can take card payments through your mobile device using attachments from banks and pay services. If you can invoice and be paid on the spot, there's no down time chasing payments later.
Granted, I'm not offering you autolacing shoes, but give these things a go and you'll enough time to do it yourself.