The owner's manual for the George Foreman Lean Mean Fat Reducing Grilling Machine is a masterpiece of the form. The ''how to use'' section runs less than a page; the ''safeguards'' warnings are quick; the rest is recipes (e.g., ''The Champ's Sausage Without Guilt''). Its user-friendliness bodes well for his Guide to Life. At 124 pages, his how-to is lean but not mean to a fault, as he offers frozen patties of breaded wisdom like ''If it can be dreamed, it can be done!'' and ''The buck stops with you!'' Remember the When We Were Kings days when George was scary? However inspiring his newfound good cheer, finally, his Guide to Life's worst feature is his grill manual's best: It's kind of unnecessary.