If you are currently on a break from Guild Wars you may not have paid too much attention to the 4th Birthday hullabaloo but you should still avail of this once off chance to get a free storage upgrade. Free storage is always good but the offer runs out this week so hurry.
Details of how to get free storage here. The site is a bit slow but the gist is that you log into your NCsoft account and go to buy an extra storage slot, normal cost €8.99. When prompted you enter the promo coupon FREESTORAGE and voila the price drops to €0.00.
While you are at it go have a look at the other game enhancements. Who knows you may be tempted back into the game.