Here is the steps for Launching FBA products as I follow.
1) Find the best product with check points like less competition, a good BSR, great demand in market, light weight, small in size and 20 more check points.
2) Get the best 5 quotation from the Manufacturing Trade assured Gold Supplier and go for sample from 2-3 and finalize with one .
3) Create a superb listing with Seo enabled keyword Title, Sub Title, bullet points and attractive images.
4) Go for give away so that Ranking improves and the same time we should try to get few Reviews.
5) Setup the Manual PPC and manage it effectively and make the changes weekly as per performance of individual keywords.
6) Set up auto mail responder for Feedback and Review.
7) Within 2 months we can sell upto 300 products monthly for each product with simple optimisation and small PPC budget.
8) Respond to each query of Buyers with positive attitude and if necessary try to gift them the item in case of faulty or mistake from our or amazon side.
Now we are stable with some good rank of around 5000 so you can go aggressive by increasing the daily budget and bid rate and in another 3-6 months you will be selling 500 – 1000 numbers monthly with each product. It’s very easy. You don’t need to be master. Just be patient and always keep experimenting until you get the result.