A quick blip even at slow speeds/RPMs, allows to catch the revs as the fall, oppose to forcing the revs up. This is the ideal method, granted there are situations where just easing off the clutch and letting that alone sync everything up okay too, but generally speaking it's best to blip/rev-match.
For the speed bumps and parking lot, I'm using the clutch to modulate my speed(letting it slip, or typically a in/out dance), more than the throttle, to get over a speed bump if I don't carry the speed to make it over, as otherwise I just clutch in, and use the momentum to go over. Much the same with incline at slow speeds, or navigating a tight parking space, the clutch is used to control speed, more than throttle. This is done lightly and within limits, so not to burn the clutch, to which it has never occurred. Very steep inclines slowly, where you can't carry any forward momentum, I'm going for full on/off clutch engagement as soon as possible, and hanging onto first.
I've tackled S.F. streets and downtown Seattle streets with no issues, those are properly the hardest there is, especially during stop and go traffic up a steep bank.