Yup, I manifested an extra $40k the other day!
First, you have to feel the vibration of financial freedom. Which means you have to raise your vibration and every chance you can, you have to give. Give to charity, or anyone else you can. Buy yourself little luxuries if you can afford it. And if you can't, do the best you CAN- do your own spa day where you take a bath, and give yourself a facial. Little things that make you feel abundant. Consider how wealthy you already are- if you are on this forum you are ahead of 80 percent of the worlds population. Appreciate and be grateful for the small things. Because they are actually big things.
Intead that you'll find cash. Start small if you have to, because your beliefs must match your vibration. So begin with coins. Then work up to a $50 note. Then $1000. Carry $100 in your wallet and don't spend it physically- but EVERY day think of all the things you could buy with it! As you walk around, acknowledge that you can buy that "thing" right now! And this thing, and that other thing.. It feels great!