Short Term Investing - What is best route to take?

I am looking to invest at 90 day or less intervals into something that is liquid and has a consistent rate of return. The reason I want to do this is I get paid commissions and only pay the taxman once a quarter. So, I want to make short term, 90 day investments that I can skim a little off the top and then send in the rest to the IRS. Any ideas would be great!

Consider the Vanguard Prime Money Market Fund. It currently has a 5.22 compound yield. It is liquid on a daily basis.

I don't know what kind of budget you are looking at but perhaps if you just start looking around your house and thinking about EVERYTHING as an investment.

Instead of dishes, get china
instead of T.V., get books (invest in your mind)
Instead of a new car, get a classic (only goes up in value)
Instead of saving cash, save gold/silver peices

Just some simple things like this can change your whole mindset until you start to look at everything as an investment. Gas becomes an investment to get to work, you weigh cost vs. return. Once you're in this frame of mind, money just comes to you.

Get a money market account at Capital One. Pays 5% currently and is liquid.

Learn a bit about market timing and swing trading.

Yes. Money Market Account at Capital One or you can try your local banks. They have 30/60/90 day Certificates of Deposit. The rates are usually low, but sometimes you can find a promotion that pays 5%+

CD's are FDIC insured also, so you can't lose your money.

T-Bills.
Especially if you are in a high state tax bracket.

cd's, t-bills

now make sure you don't loose your principal investment.....,

Are you talking about Investing in Mutual Funds?

In Stock and Commodity Markets there is a common secret..
Thats it.. There is no Short Term or Long Term Investment.. When you enter in a wrong stock in a wrong time taking a wron position, then you have to wait till comes to your profit side. This is what I call as Long Term Investment.. When you enter in a right stock in a right time taking a right position, then you dont have to wait for anything because it would be in profit in a very moment.. This is what I call it as Short Term or even very Short term..

I hope you got it...!!!