Question: Any tips for using iCloud on work Mac?

Part of the appeal of the Mac ecosystem as most of us are aware, is the interconnectivity of all services and devices. However, I've began to get self conscious about leaving my iCloud logged into my work Mac, with all my personal emails, photos, keychain and text messages synced.

How are others handling this? Not using personal services on a work computer? Is anyone logging these services out at the end of each day? I'm afraid in the UK my employer would have the right to all of my data if I left it logged in, or if they demanded the password.