Mamagoose...not to rain on your parade, but if you just started your started yesterday or the day befor eit is not going to be ready to use yet. You want to give it time to stabilize, time for the good beasties to overtake the bad that are likely growing in your new starter.
http://www.sourdoughhome.com/startermyway.html
The reason we discard half the starter each time is because we want to double the size of the starter with each feeding. If we don't discard half the starter each time, the amount of starter will fill a modest sized swimming pool in about 10 days, an Olympic sized pool in 14 days, and a second pool the same size Twelve hours later. That's a lot of flour and that's a whole lot of stirring!
Some people object to discarding starter. It is made of flour, and it seems a shame and a waste to throw it away. At this point in the cycle, there is no telling which organisms are in the starter. I feel that until the starter is stable, it is better to discard the wannabe starter.
The following is from this page:
http://www.sourdoughhome.com/startingastarter.html
The mythology of sourdough is that you are capturing yeast from the air. However, there are many reasons to believe that doesn't happen very often. When people take care to sterilize the flour and water they use to catch a culture, it fails much more often than not. When they don't sterilize, it almost always works. In short, the flour has wild yeast in it, and chances are you are providing the lactobacillus from your skin. All you need to do is encourage their growth.
A few years back the lot behind our house was being sold. We decided to buy it. The lot was a vacant, untended lot in our hometown. It was a weed patch. And it was aggravating the neighbor's sinuses. When the neighbors found out we had bought it, they hinted it was time SOMEONE started taking care of the lot. We really didn't want to sod the lot, nor did we want to seed it. A bit of reading, and we had our strategy in hand. We weren't shooting for a lawn that could be featured in a gardening magazine, just something that would be okay and not make the neighbors sick.
The grasses people cultivate like to be watered often, so we ran a hose to the lot behind our house and started watering the lot regularly. Next, most weeds like to grow tall, so we started mowing the lot as often as we mowed our own lawn. Our mower is a mulching mower, and the theory is that the mower will destroy weed seeds and chop the grass and weeds so finely they would decompose and quickly act as fertilizer. When we had some fertilizer or weed'n'feed left over from our yard, we'd put it on the back lot.
The first year we did this, the lot was better largely because we were knocking the tops off the weeds. The second year, we started having grass move in from the neighbors lots. Each year there were fewer weeds and more grass. It never became a candidate for inclusion in a gardening magazine, but it was far from the worst lot in town.
You're probably wondering why I told that story. Honestly, it is the best analogy to starting a sourdough starter I have been able to come up with. And it IS a true story. When you use whole grain rye or wheat flour, the flour is covered with a LOT of microorganisms. We're interested in two of them, yeast and lactobacillus bacteria. When we mix flour and water, and keep adding more flour and water we are encouraging the critters that we want to take over the starter. By creating a hospitable environment, the critters we want will inevitably take over the culture. However, just as in the back lot, you are never completely rid of weeds, or the unwanted microorganisms. As long as you keep the conditions in your starter favorable, the unwanted critters will be kept under control. But, just as in the back lot, if you stop treating the starter right the unwanted critters can take over.
That story makes it sound like a straightforward process for both the yard and the starter. Sadly, it isn't. Stray weeds can take over the yard. Keep watering and mowing, and they go away. Similarly, when a starter starts there is no assurance that the right microorganisms will be the first ones out of the gate to take over the culture, and that they'll keep control over the starter. As noted above, whole grain flour has many, many microorgranisms on it, and we're really only interested in two of them.