A Few Good Ideas:
It is a good idea to keep detailed records of your herd, this may come in handy in the future. For example, if you have a sick goat, it is a good idea to keep a health record and write down the date, medication given, amount, and why. You may need to refer to this in the future if you have another goat that becomes ill with the same symptoms. It is also a good idea to have a wellness pen somewhere away from the healthy stock until the animal is well enough to go back out with the herd. Also, a wellness pen will save you the time of trying to catch the animal you are trying to treat. Believe me, they know when you want them. All we have to do to empty a barn in a hurry is walk in with latex gloves on and there wont be a goat to be found. If you have two goats with similar symptoms of illness, it is a good idea to treat them with different medications to see what ultimately works and then use that found treatment on the other goat that is ill.
When building a barn, build it larger than you need, remember as your goats get bred and kid there will be more mouths to feed and they will need more room for bedding. If your animals have several acres available for pasture, during the summer months, give them a little bit of grain every evening to ensure that they will be bedded down in the barn at night and not somewhere where predators may lurk. This will also help you to see your stock to check for any injuries or illnesses.
It is also a good idea to vaccinate your herd with Bar Vac or like brand of CD/T - 2cc per animal regardless of weight. Administer first dose then re-dose 21-30 days later, then anually after that. CD/T will protect your goats against overeating disease as well as vaccinate them for tetanus for a whole year just incase they happen to get a cut or injury. Do not give CD/T to show animals where it is visable, some animals will experience and injection sight reaction which will cause a lump that will remain for several months. Vaccinate show animals in the brisket where there is loose skin and it will be much less noticable if they react. Also, if you find the need to use Synergized Delice on your herd, some animals will experience significant hair loss as a reaction to this product, do not use it on show animals. Goats are more prone to lice or mites during the winter months.
It is also a good idea to have a goats water located outside of the barn somewhere will they will have to walk to get it. This will keep it cleaner longer.
It is a good idea to have a quarantine pen away from the rest of your animals to keep new goats in when you're building your herd. New additions to the herd should be quarantined for several months before being released into the herd to help ensure that they are disease free and healthy. Or, goats that are being shown should be quarantined after each show. Shows are a great place to pick up diseased or illnesses such as Sore Mouth, CL, Pinkeye, Coccidiosis, Lice, Mange Mites, Ringworm, etc. If we are around other livestock, when we return home, our shoes are taken off in the vehicle and left there until they are disinfected, our clothing is put directly into the wash, and we shower immediately. Then, our shoes are disinfected and the vehicle is disinfected. We also have certain clothing and shoes that are worn to the barn and no where else to help ensure that our herd is protected. The more animals you have, the more cautious you have to be because of the investment that you have to protect.
It is a good idea to keep a kidding kit close by the door. A cheap tool box works great to make a kidding kit. You should have lubricant, latex gloves, shoulder lenght gloves, a snare, umbilical cord clamps, and anything else you might need during kidding. It makes it nice to have all of your supplies in one convenient place that you can just grab it and take it to the barn with you instead of having to look for the items you need when your goat is in labor.