Step 1: Identify your market. Take a while to sit and watch for what sells and what doesn't out of the items you're interested in. Don't forget to keep a note of any market research data you come across as this could be very useful to you later on. You'll probably see the 'sweet spots' quite quickly - those one or two items that always seem to sell for a good price.

Step 2: Watch the competition. Before you invest any money, see what the other sellers in your category are up to, and what their strategies are. Go through their auctions with fine-toothed comb, uncovering any flaws that may exist, because this will give you your opportunity to move in on them.

Step 3: Find a product: When looking for suppliers for the product that you intend selling, don't be afraid to ring round a few. This will ensure that you get the best possible deal. If the eBay prices you've seen are higher than the supplier's, then you're all set.

Step 4: Start small: Don't throw thousands at your idea straight away - get started slowly, see what works and what doesn't, and learn as you go. Remember that it's very cheap to try out even the craziest ideas on eBay, and who knows, they might just work!

Step 5: Test and repeat. Keep trying different methods until you find one that works. Then repeat it, over and over again. The chances are that you've just found a good niche.

Step 6: Work out a business plan: A business plan doesn't need to be anything formal, just a few pages that outline the market opportunity you've spotted, your strategy, strengths and weaknesses of the plan and a brief budget. This is more for you than it is for anyone else.

Step 7: Invest and expand: This is the time to throw money at the problem. Purchase the necessary stock and invest more time in your business. Set a goal number of sales each week, increasing it each time.

Step 8: Make it official: Once your sales go over a few thousand dollars, you can no longer consider your activities to be a hobby. Now is the time to register yourself as a business. Don't worry, it's not expensive or hard to do - a lawyer is the best person to help you through the process.

Step 9: Automate: You'll probably find that you're writing the same things again and again in emails or item descriptions. This is the time to give up on the manual method and turn to automated software that can create listings for you, and respond to completed auctions and payments with whatever message you provide.

Step 10: Never give up: Even when it looks like it's all going wrong, don't stop trying until you succeed. If you keep working at it then you'll almost always find that you make a real breakthrough just when things are starting to look desperate.

Once you get into the swing of things, you might start thinking that you should quit your job and take up eBay selling full time. But it's not always as easy as that - there are all sorts of factors that you need to consider. You must ensure that your eBay success is a regular occurrence and not just a flash-in-the-pan before taking that final step. Have patience, it WILL come.