Manifesting something you need is a difficult and tricky business...I would classify it as the advanced level of manifesting.

Better to start with easy, simple things - and practice on next Thanksgiving instead.

I started off many years ago, as many people do, with manifesting easy things like parking places in busy areas. Once you get good at this, start manifesting empty tables at busy restaurants or empty seats on busy trains.

Then gradually move your skill level up to things that you believe are harder to manifest.

For example, I saw a great looking expensive sports car in a movie once - it would have cost me more than my annual salary at the time - but I decided I wanted to manifest it - and it eventually came a few years later (I was still getting the hang of the various processes)...I still drive that car today. :)

If you are asking for specific processes, then I don't think there is any book full of more useful ones than Abraham's Ask & It Is Given.

Also, check out my manifesting spreadsheet if you want some ideas on how to use those Abraham processes systematically (I honestly use this everyday and it really works) but as I said start with small, easy things...not Thanksgiving dinner and a nice car!

EDIT:

Remember that it is not that spreadsheet itself that is important, it is just a computer spreadsheet, not a magic device.

The point is that it acts as a focusing tool to enable me to approach these subjects systematically...that is what is important.

Most people will accept they have to spend years of systematic practice and training to play a musical instrument well. But when it comes to creating a wonderful life through focused thought, they expect it to come by doing nothing at all (regarding their habitual thought patterns). And they expect it all to come immediately.

And when it doesn't all come immediately by doing nothing, they will invest much larger amounts of time in telling everyone it doesn't work. :)