4. Keep appearances in mind. You may be a solid employee with no blemishes on your work record, but the constant sight of you on your smartphone could rub co-workers and higher-ups the wrong way. "Even if you are reaching deadlines or meeting goals, it could be a perception that you're not working as hard," says Hosking.
To ensure you're perceived as a disciplined worker, try spending more time on the keys of your company desktop rather than those of your iPhone or BlackBerry.