How do i put an order into the universe?

Based on the law of attraction, a universal law, which applies to anyone. 
Our thoughts are powerful and creative. Cosmic ordering is about harnessing that positive energy and using it to help realize your dreams and goals.
Visualize in as much detail as you can, you have to be precise what it is you want and hold that request in your mind with no worry but setting your intention, release it to the universe. The universe should then be left to its own creative way. It's important to not worry or think about how it will happen, as the universe can often manifest for you in the most unexpected and surprising way. 
Think of it like this, if you placed an order from a catalogue you wouldn’t worry about how the goods would be delivered, you would just wait for them to arrive, so do the same here and forget about it, let the universe do it’s magical work and sort out all the details for you.
Is there certain things i can ask for?
Always be positive and open when asking. It can be anything from a new home, a soul mate, money, healing, health, a new car – be as creative in your desires as you wish, it can be small things or large things, it’s your list to update and amend as you want to. Start by asking for small things for example a parking space, or a seat on the train in the rush hour. It is best not to ask for too many things at once and to be thankful and grateful whenever it comes your way. Don't let worries come in the way or you might block the universe from helping you.
After Peter passed, i was in need of a table and chairs and couldn't afford one, i sent out my thoughts and a couple of weeks later someone mentioned they had one they were giving away, it was immaculate and done the job until i could afford one.
“Be careful what you wish for… you just might get it!” This needs to be considered, as the universe is indeed very powerful. Make lists and really think things through. You can cancel and change orders but don’t confuse the universe with too many differing requests, be very clear. Be specific.
It is important to be positive, make it personal to you. Make sure theycome from an open and loving heart. It does not work to wish for things for others that are vengeful or negative.