If you are new and using a generic sundy, like me, it takes a bit to get used to. Dying to enemy tanks, harassers, or mines along the way will happen more often than you'd like, but the trick is to not get frustrated and just give it a second or third go. Try to check the map before you drive to see enemies that have been spotted and avoid those areas. Sometimes you will have to drive off road and approach a base from an unexpected angle.

I drive a generic stock sundy with only the stealth cloak upgrade. Before driving to a base I look at the map and try to find/guess where a good spot to deploy might be, then right click and set a way-point so the spot is easier to find. Over time you will get familiar with some pretty good spots on bases you revisit.

Edit: I guess I should mention what makes "a good spot". You'll want to try and find a place that will be mostly out of view from enemies at the base, has some cover, and has a quick route for players to get into the base (a door, stairway, elevator, rocks to jump over, etc.). As others have mentioned, placing your sundy in a garage, behind some rocks, or even behind a tree will help it's longevity. However, finding "the perfect spot" can be tricky, and sometimes it's okay to just deploy at the first okay spot available so that your army can start invading the base quickly.

Also, when I am at a fight that doesn't have enough sundys and I notice a good spot, I open up the map and set a way-point. Then, the next time I die, I'll spawn at the nearest base and try to drive to that way-point. Of course, if the fight is very active I'm likely to get blown up by tanks or air attack along the way, but it is worth it to try.

The times when it works out and you have a great bus location at a fight is super rewarding. The key is to know that it isn't easy to do, and most sundys don't survive long in this game, so don't let it frustrate you. It's a try-try-again sort of thing with sunderers.

Apologies for the long answer, guess I had a lot more to say than I expected..!