I subscribe to about 20 very good labor and employment law blogs. This week, one of the blogs I follow posted a good summary on the employee duty of loyalty and what activities are proper and improper for an employee to engage in who is about to start a venture that competes with his or her current employer.
Jon Hyman’s post at the Ohio Employer’s Law Blog titled "Do you know? The duty of loyalty: illegal competition vs. legal preparation" is a good place to start when evaluating an employee’s duty of loyalty and the activities that are loyal and disloyal to an employer.

For more than 15 years Texas employers have used the application of uniformly enforced neutral absence control policies setting a maximum duration an employee can be away from work as a defense to workers’ compensation retaliation claims. The defense was first solidified by the Supreme Court of Texas in in its 1996 Continental Coffee Prod. v. Casarez case. See 944 S.W.2d (Tex. 1996). Employers who end the employment relationship with a worker’s compensation claimant for violating reasonable absence control rule will not normally be liable for workers’ compensation retaliatory discharge claims if rule is uniformly enforced (i.e., it is applied to all types of absences and not just those arising from on-the-job injuries). Following Casarez Texas employers routinely included neutral policies setting forth neutral absence control policies that set maximum durations of time for employees to be away from work (excepting from the maximum duration certain types of statutory protected leaves like FMLA and USERRA leave).