No matter what happens, no matter how it seems on the surface, pull this phrase out of your arsenal. When you say "I declare it good!" you give an order to the Universe and the Universe complies. What may happen if you don't continue to say and feel this is that you'll make the Universe move away and bring more of the same stuff that you consider not optimal. If you don't hold on to the "Good" Vibration, then you'll end up right back where you started and you'll be creating more of it.
But, if you continue to be tenacious and hold onto the "I declare it good" thought and feeling, then your momentum will switch in the direction you would like it to go. If you start saying this right away after something happens, the "bad" momentum will not have taken hold yet so it's easier to switch.
I know it may be difficult to think about this phrase in the heat of the moment. That's why it's best to make an index card with the primary phrases you should be using rather than the "oh sh*t" phrases that might come out of your mouth when something happens. Since it's hard to remember things when you're in the heat of the moment, having the index card available, makes it easy for you to come up with the positive, momentum changing phrase that feels right. The key, of course, is to remember to pull out the index card. But there's only so much I can do to encourage you there.
If you say "I declare it good" over and over again, you'll have more success than you can imagine. If you have a physical condition and declare it good, you have no idea what might happen that will help others - whether they are your family and friends or whether it gives you an idea to reach out to thousands of people through the internet.
Declare it good and ideas will come to you. You want to open the doors and windows of creativity and this is one way to do it. If you're a writer and have "writer's block" simply declare it good and see what happens.
If you've just broken up or ended a relationship, declare it good and the love of your life may just show up. I knew a woman who's husband of over 22 years was found to have been cheating on her for almost 20 of those years. She was devastated, naturally. She declared it good and amazingly (or not so amazingly) she found the greatest guy in the world and has been happily married to him now for over 10 years. She would never have believed it would happen but she went along with our suggestion even though it seemed weird.
Try this and see if it works!