Summarize the following:
If you are new to e-cigarettes, you may want to start with an e-cigarette kit, which can be purchased online. Many light to medium smokers go for a rechargeable starter kit, instead of a disposable one, as the e-cigarette can be used many times and is more cost-effective.  An e-cigarette starter kit will contain a rechargeable battery, a charger, and a nicotine liquid cartridge. The nicotine liquid can come in a variety of flavors and different levels of nicotine. If you are a smoker who is trying to quit, you may go for a low level of nicotine and a flavor you enjoy tasting in your mouth to limit your nicotine intake. You can get a starter kit with several different flavor cartridges so you can try different flavors and find the ones you enjoy. Most e-cigarette starter kits cost about $40-$100. Consider investing a kit with a higher price point if you plan to smoke every day or at least several times a week. Going for a cheap kit may mean lower quality and poor flavor choices. Because your e-cigarette runs on lithium batteries, it is important that you fully charge the battery before using it. Many e-cigarettes will come with the battery partly or fully charged. Make sure the battery is ready to go by placing it in the charger and waiting for the charged signal or light to come on.  Most batteries for e-cigarettes are rechargeable and can last up to 250-300 uses. Batteries often last longer when they are recharged and used regularly. Avoid placing the batteries in direct sunlight and heat. Do not get them wet or drop them often against a hard surface, as this will significantly reduce their lifespan. Try to charge the battery before it is completely drained and always store your batteries fully charged. Storing the batteries with less than 50% charge left can drain their use in the long term. Once the battery is fully charged for the e-cigarette, take it off of the charger. Then, take the liquid cartridge and screw it into the slot on the e-cigarette. Your e-cigarette may come with pre-filled liquid cartridges, or you may buy e-liquid that you can then drop into the liquid cartridge. Pay attention to the liquid in the cartridge so you can note when the liquid cartridge is close to running out and requires changing. If you are planning on being a regular e-cigarette user, you may want to keep several extra liquid cartridges on hand for easy replacement.

Summary:
Buy an e-cigarette kit. Charge the battery for the e-cigarette. Screw in the liquid cartridge.