I was thinking, maybe making this thread a sticky, where folder owners can drop an advice for the newcomer/curious to improve their knowledge "the easy way". Upgrades, hints, pros, cons, advices about accessories, etc.
My advice is: Make sure you have proper tyre pressure. Since the tyres are small, less PSI makes a big difference. Buy a decent pump and check your pressure more often than you are used to with "conventional" bikes. You will be impressed with the results.