I was introduced to chanting mantras by a good friend of mine. We both had a similar take on the Law of Attraction: sometimes it worked for us, sometimes it didn't. But my friend claimed that chanting mantras actually seemed to work for him. So I tried it out for 40 days.
Here are 2 mantras my friend gave me:
For abundance: "Om Shrim Shrim Shrim Maha Lakshmiyei Namaha." (Later I found through research that if you're over the age of 28, instead of "Namaha," you say "Swaha.") Realize that abundance may not necessarily show up as abundance in finances. It could show up as an abundance of friends, an abundance inlove, etc.
For overall good luck: "Om Sharavana Bhavaya Namaha" (I haven't heard people replace "Namaha" with "Swaha" when saying this mantra. Some say there are some mantras that require it, and some that do not.)
How to a Chant Mantra
State your intention and then chant your mantra for 54 to 108 times a day, twice a day, for at least 40 days. The main part of the rosary has 54 beads, so you can use one to count along. If you're at work or any other public place, you can just say the mantra silently in your head.
It might be tempting to stop before 40 days if it seems like nothing is happening. Stick with it, and trust that you'll reap the benefits in the end. You've got nothing to lose, and a whole lot to gain.