Good luck. The challenge with most of the USB stick miners is that they don't have a high hash rate. Yes, multiple gigahash may sound like a lot, but in the grand scheme of the bitcoin mining universe it's almost unnoticeable.

This site gives you a reasonable idea of what the bitcoin network looks like:
https://bitcoinwisdom.com/bitcoin/difficulty

In the top left corner is the bitcoin network stats, and in the top right is a way to estimate how much you might earn before factoring the cost of your electricity. Here is a screen capture of the details for my Compac that has been overclocked to 325 MHz and turning out ~17.8 GH/s:



I updated the price per bitcoin (BTC/USD) to 1021 which I got from this web site:
http://coinmarketcap.com/currencies/views/all/

As you can see my Compac miner might earn me 10.07 US cents per week before I factor in the power to run the hardware miner and the power to run the computer where the mining software runs. If you look at the fraction of a bitcoin/day, 0.00001409, please note that's not much at all. It's considered "dust", and in fact wouldn't be paid out by most pools.

So what I, and a number of others do is use these Compac miners as "lottery miners" running them on a solo pool, I use solo.ckpool.org (see the link in my sig) and "play" in the gekkoscience fun-run on gekkorun.de:
https://bitcointalk.org/index.php?topic=1452817

Cheers,

- zed