Keep a close look on the bar showing the next three marbles to be dropped onto the field (unless Show Next feature is disabled). More often then not you will appreciate the information if provides.

Try to keep at least a half of the game board cleared. Letting the balls to pile up will almost certainly lead to a loss.

To make your game easier always keep more then one line of the same balls ready for clearing. This can be achieved by building the consecutive lines of the same balls everywhere possible, instead of concentrating on one line at a time.

Try to keep more then three almost completed lines existing on the game board at all times. Almost completed means that they are four same balls in length, and only one ball remains until their completion.