Location, location, location is a big one. Traffic is everything. We have a counter with 6 stools, that people will sit, talk about MODs, RDAs, Tanks, Juices, and everything else. You would think that people sitting there would be a detriment to sales, but they are some of your best sales people. Someone that's not an employee of the shop recommending something, carries a lot of weight with consumers. We've got a young lady that works for us part time, that can out sell either one of us hands down. Her circle of friends, and their circle of friends, bring in a lot of business. We charge $5 for rebuilding an RDA, or RBA, If your'e a regular customer that buys juice, there is no charge for an occasional rebuild. Treat people, like you want to be treated. If you can find a vendor to supply you a large assortment of good flavors and attach your label it's huge. You can sell house juice at a much better price than the premiums and still maintain good margin. Still stock the premiums, but the affordable quality house juice goes out the door at least 3 times as fast as the premium, with much better margin. Have a good POS system that also supports inventory control, and reporting, run everything through the POS. If you grab a bottle of juice for yourself, run it through the POS. If you drop a bottle of juice and it breaks, mark it in POS. Stay on top of the industry, with what's popular. Careful about how much hardware inventory you stock. If popularity starts to drop, keep lowering the price until it's gone. The money is in the juice. Number one rule; "Don't Lose Money". Good Luck!, it's a fun industry.