Which is the best alternative to job specialization?

Some alternatives to job specialization include job enlargement, job enrichment and job rotation. Job enlargment is a good idea because it could possibly make the employees feel more important and not get bored with their job. However, some employees do not like the idea of a bigger work load and would get stressed out. Job enrichment is nice because it should definately make the employee feel more powerful and influential in the work place. Sometimes this isn't for all people. Some people like a steady work enviornment such as the original job specialization. In my opinion, job rotation is the best alternative to job specialization. I believe this because doing something different everyday or every few hours helps work go by faster. Also, it educates the worker to be capable of working in other parts of the business in case of another employee calling in sick. Although it does cost more money to train employees in all of the different fields I think that it is beneficial in the end because you won't be totally out of luck if one of your employees calls in sick. What are some other ideas for alternatives to job specialization?