You need to be more detailed in your question for people to answer this. This is appearing when i am search carpentry training courses so i will relate your question to that. It depends what type of...
It really depends on your approach, some take a strictly scientific approach while others are less so but still effective. ACSM, the American College of Sports Medicine and ACE the American Council...
There are training courses available in every field and most specific occupations. Everything from accounting to concrete laying to software development is available to take in the UK.
IT training course can be completed in a variety of ways. The easiest way would be to find an online course. But, the best method is still the old- fashioned physical classroom with instructor...