It depends on your situation. If you can support yourself on a part time income and then focus on the new business venture more that is great, if you need a full time income, then you do that first. Falling behind on your bills now to get a business going in the future is not a good business practice!
Tony
To be quite honest, I would suggest getting a job and then using your evenings and weekends to daydream and surf the net. In the meantime, I would try to isolate what it is that motivates you internally and externally and try to find a business venture that does at least one if not both of those things.
For example is technology motivating? Social issues? "The deal"? AND do you need verbal affirmation in your job? Do you need to make a lot of money to be motivated? Zero in on these things to help you pinpoint your vision.
It took me several years from dreaming to doing to get my business going. I did alot of planning before I pulled a business license or had business cards printed.
Best of luck!
I`m part time, but I make three times the money I made when I worked full time. The greatest blessing of keeping my job and working on my business part time was that I trained myself to get a tremendous amount of work done in a very short period of time.
That being said, when they finally decided they no longer required my services-- there was no doubt in my mind that I would not be going to get another job. At that time, I was NOT making nearly the money I thought I needed to quit. However, I took the next three years and worked ON my business (not to be confused with working IN my business- I do NONE of the actual work, I`m the conductor of this orchestra) and when I needed money I worked odd jobs. I have done everything from bartending to painting for $ because I always wanted to be careful not to take money from the business.
A business is like a baby. You can`t expect it to feed you and wipe your behind until you`ve fed it and wiped its behind first. 
So, right now-- it`s not about you. It`s about what`s best for the business. Take care of it, it`ll take care of you and yours for generations.
Hi Tigon88:
If you don`t yet have a business idea it is unlikely to come to you at this point- especially since your starting to stress after one week of being out of work. Since money is at least temporarily not a problem, get a job in a field you are interested in. It will help you to be exposed to new people and new places and new things and that will help you come up with a new idea for a new business and you`ll still be able to contribute to the bills!
In defense of the OP-- Walt Disney was nearly bankrupt after he failed to protect his intellectual property (Oswald Rabbit-- recently purchased after all these years by Disney) and he was fired by the studio he worked for.
He came up with "Mortimer Mouse" on a train trip across country. He, and the rest of us can thank (or blame, depending on your perspective) his wife for re-naming it "Mickey Mouse".
Basically, he chose to take a sabbatical instead of getting a job-- and I think we all know how that turned out. Sometimes all you need is the appropriate time away to recharge the batteries, and quit worrying about things for inspiration to strike.
get a job in a field you are interested in. It will help you to be exposed to new people and new places and new things and that will help you come up with a new idea for a new business and you`ll still be able to contribute to the bills!