There are a number of quick and easy ways to ensure you are getting the most from your deck. This page provides a set of basic tips and tricks on how to win at R&R.
Use a Balanced Deck
Make sure you have a balance of attack and defense cards in your deck. Always having defense cards at the ready will give you a big advantage.
Match Defense Cards to Attack Cards
The point value of a defense card gets converted into a percentage; the lower the point value, the lower the defense rating. A card with a point value of 1,000 has a potential defense rating of ~10%. Use the storage row to save your big point defense cards to play against the big attacks from your opponent.
Play to Your Strengths
Build decks with cards that play to your strengths. If you have a high skill level in Hand-to-Hand, play lots of Hand-to-Hand cards. If you're a Ralak, play lots of Slashing cards to get your 10% species bonus. Trade with other players to maximize the potential bonus points from your card inventory. The species bonuses are detailed in the Characters section of the game guide.
Maximize the Random Draw
Ensuring you bring the right number of cards into battle is a big part of a winning strategy. Bring too many cards and you'll draw your weaker cards as often as your stronger cards. Bring too few and you may run out. If you run out you'll get your deck back, but you'll suffer a 50% penalty to your health. It's next-to-impossible to win after this happens.
Manage your Mana
Read this first: Mana Basics
It's not always a good idea to bring your most powerful cards into battle. They look cool and do massive damage, but you get a better damage / mana ratio by playing cards closer to your level. You may also end up wasting turns playing low-level cards - or worse, having to skip turns - to save the mana needed to play your higher-level cards. Build your deck with a lot of cards that cost 0 to 3 mana points. You can throw in a few 4+ point cards for fun, but it's better to trade those to players with higher skill levels.
Discard to Win
It may seem counter-intuitive, but discarding good cards can often be the best move. During battle, always keep a selection of cards that cost 0, 1, and 2 mana points in your hand. This will ensure that you are always able to play a card and won't have to skip a turn due to insufficient mana. Nothing's worse than staring at a handful of 3 point mana cards with no mana points to spend.
A good way to keep your hand as useful as possible is to keep refining it at every turn. Before you play an attack or defense card, look through your hand and compare each of the cards that cost the same amount of mana. If you've got two or three cards that each cost 2 mana points, discard the one with the lowest damage value. This maintains your ability to play at each turn while ensuring you're getting the most damage for your mana points.
Modify, Modify, Modify
Modifiers are free damage. They're played on the 'Modifier' slot at the same time as an attack or defense card. Collect and play as many as possible.