PRO TIP - If you dont do heroics or flashpoints or pvp while leveling, do all bonus objectives and bonus series while leveling. #SWTOR
— Asros (@Asros) January 12, 2012
Its not a tip so much as a rule, because leveling is modular, if you skip grouping, you have to do all solo content.
— Asros (@Asros) January 12, 2012
Or as I told someone earlier - don’t be Blender. Our guildmate ended up at 49 with half a level to go, with absolutely no source of XP outside of space missions, flashpoints, PVP, or dailies - all because he chose to skip almost all bonus series and probably a lot of bonus quests, as well.