<human>: Can you give me a shortened version of the text?

I'm flying to California from Calgary and it's my first time travelling alone. If I list some of the things I've thought of already, can you guys tell me what I'm missing? Any suggestions help greatly. I'm a 21 year old female and I've been to Cali before on a road trip with a friend three years ago, so I have some experience. But not much.

- I have an emergency credit card with a $500 limit. I'm going to ask my bank if they would consider increasing my limit for the duration of my trip as a safety net. Is this a thing that banks will do?
I plan on staying in the most affordable motels possible. I don't care about quality, but I'd definitely be worried about safety. Any major warning signs I need to look out for?

- I have a friend there who I met my first trip and we are now Facebook friends. He's offered to pick me up at the airport and pretty much be my guide since I don't drive. I trust him, but I always plan for worst case scenarios. Is there anything I should know about cabs or buses in the area? I've heard bad things.

- Absolute worst case scenario - something really bad happens to me. I get mugged, lose my wallet/passport, get arrested (not that I'm planning on it), etc. what are my options? What can I do as a traveller?

- Last thing, can anyone recommend a good trip planning app or web site? I got a TripAdvisor app for my Android but it isn't exactly what I was looking for, and Google only turns up public transit trip planning sites. It's hard to explain exactly what I'm looking for, but something involving help with budgeting, hotel prices, flights, things like that. Does this exist?
<bot>: I'm flying to Long Beach alone as a 21 year old girl and I need any advice or tips that anyone can give me. Either specific to the area, or about travelling in general.