Most people will tell you to soak your ball - however many balls don't care much for water some fear it - soaking creates stress and dehydrates your ball - both of which you need to try to avoid during the shedding process. In fact if your snake really needs to soak it will do so on it's own.
To remove eccess sking prepare a nice wet warm towel (or wash cloth is your dealing with a small snake). Put the snake inside of it cover it up and let it sit there for a few minutes. Then gently coax the snake to wiggle around inside the towel apply a bit of pressure and the skin should come off fairly easily or gently rub with warm wet wash cloth/towel from front to back. Towels work much better than pillowcases as they have a rougher surface. It's not quite as easy as just plopping it into a bowl but it's less evasive.
If you don't get all of the skin off that is ok - most of it will fall off on it's own or come off in the next shed. Do the best you can and try not to stress out the snake too much.
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Tosha 
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7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Anakin Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
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