Why won't my iPhone sync to my iMac?

I'm trying to sync my iPhone 4 to my iMac using iTunes but every time I plug it in and click sync a pop-up window says "The iPhone could not be synced because the sync session failed to start." I made sure the cable was plugged in right and everything looked normal, in the settings, summary, etc. But it still won't sync. It's not syncing wirelessly anymore either.
If anyone knows the solution to this, that would be great.

Why does music box keep crashing when I press search?

I'm running in 5.1.1 jail broken iPhone 4 and I downloaded music box. It was working fine for like 10 minutes then after like my 20th search it starts crashing when I press search and I can't get one search in --- someone please help

Is there a marijuana leaf symbol for the iphone?

So this girl that I'm talking to really wants an an emoji type of app/thing that will allow her to put a pot leaf as a text symbol. I'm not very tech savvy or familiar with marijuana so I was hoping someone could help. This is my first time using Yahoo Answers so thanks!

Any cheap, touch screen devices with word processing?

I was looking for an extremely basic and inexpensive device with optional or no internet for note-taking and basic sketching. It would also be ideal if it was equipped with a stylus. By inexpensive, I mean $350 or less, so the iPad is out of the question. Additionally, it would be helpful if the screen was larger than that of a cellphone like the iPhone, so standard tablet sized.