There's no mystery to it and it's really quite simple. Plus, if you learn how to cut your dog's nails correctly and start getting your dog used to it early on, you'll save a fortune in vet or groomer fees.
Now, I can give almost anyone a quick tutorial on nail trimming... If they're standing right next to me that is. But since this is the internet I would need pictures and diagrams to show you the correct way to give your doggie a pedicure without making her bleed, and I just don't have that kind of time. Or desire.
I did, however, find this page on the Washington State University website. There are pictures, descriptions, diagrams, heck they even documented the two different types of trimmers (for the record, I prefer the Scissors to the Guillotine type for cutting all the nails, but that's just me). And there are pictures and descriptions on how to find the quick, that part of the dog's nails you never want to cut unless you like the color red.
From a training aspect, I always tell new dog owners to get their puppies used to nail trimming as soon as possible. In other words, as soon as you bring your dog home you should be handling their feet regularly, with praise and treats on hand. The dog should always accept you touching their feet and manipulating their toes. They should never feel threatened or frightened of the clippers.
A dog's nails should be trimmed often, every week or two, and the experience should be as positive as possible. Yes, some dogs just never get used to the experience and restraints may have to be used in those situations, but if you start making a part of your dog's normal routine early you'll have much fewer fights later on.
And really? Can't you think of something better to do with that extra 20 bucks a month? Like shoes? For you, not the dog.