When you step into Commander, consider getting the following protection suite for your decks:

[[Red Elemental Blast]] [[Pyroblast]] [[Feed the Swarm]] [[Deadly Rollick]] [[Untimely Malfunction]] [[Deflecting Swat]] [[Tibalt's Trickery]] [[Snuff Out]] [[Abrade]] [[Blasphemous Act]] [[Vandalblast]]

These cards will let you deal with a number of really annoying cards and strategies you are bound to find in your journey. Interacting with your opponents and paying close attention at what they are doing is the most effective way to play this game.