I'm driving from nyc to san diego. This will be my first cross country trip!! I'm trying to recruit my friends as wingmen, but it looks like I'll be driving solo. I'm just looking for advice- i.e. spots not to be missed, hints on saving money, etc. etc. I would like to get there as quickly as possible, but am willing to stop to see a few big sites. I'm thinking of just sleeping in my car but concerned about safety. Any advice, hints, etc. would be appreciated!!!