A good place to start to learn more about Ho Chi Minh and the history of Viet Nam.
I loved it... and learnt more about Viet Nam here.
Wear comfortable shoes / sandals (That are meant for walking)
Take your camera
Relax and take your time wandering around.
Best to go without a tour group as you wont be rushed off to the next spot of the palace before you are done with a point. (You can always 'eavesdrop' to guides giving information to their ppl around the palace.)