Answer:
Well you need to be prepared. There are many ways to do this and you could find a load of prep stuff along with a few techniques. I have been a successful Cryokinetic myself, I can create mist and freeze water. Holding ice cubes in your hands works. You also have to take cold showers. Once you've properly done a few techniques you can make up your own. One I made up was where I create frost all over a given point in the yard. Anyway, if you want help with Electrokinesis too, I can provide a lot with that. I get up every morning and turn on lights without touching anything, and I walk downstairs and the TV turns on and the channel changes to sports center. Hope this helps.
Addition to that answer:
All that sounds like a lot of discomfort and hard work. A far faster technique is to get yourself a bit part in the right comic strip and work your way up till you can freeze out the lead character. If it is a really upmarket comic strip you might be able to get them to write in a lot of other super-powers as well.
Like a good knowledge of science, logic, mathematics, technology, and human relationships. Addition again: Actually although holding ice cubes in your hand seems to condition your body, it damages your skin. And taking cold baths seems like an extreme. It's not necessary to condition your body that way.