Some ammendments and additions for this list:
Grouping up to do quests actually results in bonus xp, having at least one person with you will make leveling faster not only because you're killing things faster but because you're actually getting more xp for it (plus Social points).
Training the advanced class at level 10 is super double-plus important.
Sprint is actually gained at level 14 (as of last beta weekend).
There are also speeder vendors elsewhere, I found one on Tatooine near the first town's taxi-stop. It had some speeders that the one on the station didn't.