Here are some basic examples you can do to start emergency prepping. (We're not going to write you a book here.) Also check out these two posts Why should I be Prepared? and Prepping & bugging In/Out (click either to go that post)
Save a little money from your paycheck!
You don't need to save up TONS of money to start prepping, you can save a dollar a day five, ten, or even twenty dollars a week from your paycheck and use it to start prepping!
Do your research!
Look around online, read books, or ask anyone at SHTF Preppers for help of course.
Stockpile shelf stable foods and water, canned goods, ammo, medical and supplies for hygiene, etc. (Scroll down on the home page for a list of recommend stuff to stockpile ).
Get your fitness gain on!
The better shape you're in, the better chance you have surviving a SHTF situation.........If you have a bug out bag, go for a walk or jog with it on so you get use to the weight and going long distances with it.
Just like we said at the top, Research! Buy books, start a small survival/prepping library. Because when the lights go out, the internet won't be here to answer your questions.