Star Wars: The Old Republic? More to the point, would you like to level a whole lot faster? That's good, because you're going to have the chance to do just that starting this weekend. Double experience weekends are back for the next three weekends, including an extra-long version during the fourth of July, so that all of your characters can enjoy the freedom to scream up in levels and possibly skip some of the more tedious planets.
The first weekend starts on June 21st at 2:00 p.m. EDT and runs until 3:00 a.m. EDT on June 24th, while the second weekend runs at the same hours from June 28th to July 1st. The third and final weekend starts at 7:00 a.m. EDT on July 4th and runs all the way until July 8th at 3:00 a.m. EDT, which should give you ample time over the holiday to buff up your levels.