Hi! Here are a couple of hints that I've found great for those just starting out on ebay who aren't quite sure where to start!
In your chosen field (for example, women's clothes, sports, etc) go to the display at the top right hand side of the column that says 'sort by' and change it from 'ending soonest' to 'ending today'. This will give you the products which are ending from <1 minute, 5 minutes, 40 minutes and so on. Refresh these pages often as auctions are closing literally every minute, just to get a feel for it.
By watching an item, you can keep track of its progress without showing your interest straight away. Bidding on an item when it is still 1 or more days from ending may push the price up by other bidders. By waiting until the last, you can a) save on a bidding war with someone else, thus pushing the price up dramatically and b) reduce your chances of being outbid!
These hints may not always work, however I've found them to be most useful! Keep it fun and happy bidding!