I'm a new ebayer so getting my feedback score above 10 took time. Here's how I did it.
First be Patient it will take time to get the positive scores you desire.
Second Penny Auctions are a great place to start I got at least 7 of my positive feedback scores from buying from Penny Auctions.
Third selling your item pictures are a must if you cant add a least one picture chances are you want have anyone bid on your item or even look at your listing.
Fourth add as many Key words as possible in your item discription "Think like a buyer when selling"
Fifth take addvantage of all the Free services on ebay write an ABOUT ME PAGE add a real picture of your self professional is best or with the least amount of clutter in photo. Also feel out all the fields as possible. Let people get to know the real you.
Sixth when answering question be sincere or asking questions also most sellers and buyers like quick responds the same day is best but no longer than 1 business day. You will have to work can check you account summary often to stay on top to build your rating.
Seventh when selling and you dont recieve a positive feedback with in 5 to 7 business days send buyer a reminder and remember being sincere wins a positive feedback 99% of the time.
Eighth Try not to use the Item is Reserved Pricing option unless item is really rare and hard to find or one of kind.
Nineth Do your Research for both Buying and Selling very important. Not doing Research on an Item you want to buy or sell can make or break any positive feedback.
Tenth Selling and Shipping an item either buying or selling. When selling if possible offer free shipping. when buying if seller is offering free shipping contact seller ask question. I made that mistake so ask how your item will be sent to you. Be sincere very important when asking question and answering.
Eleventh Get Virus Protection very Important try to run your virus protection at least once every other day or daily if possible I know it will take time but you will not regret it Trust ME I wish I had done that when I first started. Example I bought an item from Penny Auction and got free shippment it was Recipe and it was emailed to me when I tried to down load it well my computer did not crash but it still not working as great as I would like. So ask questions if its going to be an Item you have to download. Especially if you have a different windows operating system.
I hope these few tips will be very helpful with all you selling and buying to recieve and give a positive Feedback score.