There are tons of effective and practical ways. The following are a few that have worked for us (there are a ton more):
-Idea and suggestion boxes
-Measurement and rewards program
-Employee activity teams
-Process improvement teams
-Safety and Quality slogan contests
-Problem solving teams
-Health fairs
-Personal development opportunities
-Tuition reimbursement
-Safety teams
-Work practice audit teams (housekeeping and other behavior measures)
-Give service awards for extended periods of time employed
-Electronic communication boards: We put a very large TV out in the plant that displays company news, PPM and safety info, special thank you's, etc. Employee awareness of what is going on and the status of the company goes a long way.
-Goodie basket: Give someone who went over and above a candy bar, a firm handshake, a pat on the back, and a sincere thank you--preferably by a member of upper management. If the good deed was significant (like catching a quality defect that could cost the company dearly), give them a gift certificate for a nice dinner or something of the likes.
-95/5 philosophy: 95% of the time writing rules and procedures is to address the bottom 5% of the workforce that are only there to draw a paycheck and couldn't care less. It should be the opposite. The majority of our time should be spent coaching, mentoring, and developing the top 95%. Those who can't or won't keep up will get left behind.
-Apollo approach to corrective actions: Rather than beating up the operator making the mistake, mgmt rushes to the person, apologizes that the system allowed him/her to make the mistake, and to ask the worker if they could help mgmt fix the gap in the system.
Notice that many of them include the word teams or are focused on a team effort? The whole just behind employee motivation and empowerment is not only to allow the employees to have input, but also to show that management is genuinely interested in workers' opinions, suggestions, concerns, and more importantly, their personal well being. Sorry for rambling... this is just a passion of mine. I've worked in a couple of places who needed a lot of work in this area....