How do you deal with people who try to rush you in negotiations?

I usually end of walking away from them. If they are trying to hurry me into something it's most likely only for their benefit.

I pretty much ignore them and go at my own pace.

I assume you’re referring to a salesperson rushing the customer?

I calmly ask them if they are rushing because they don’t have time for business today?  Offer to reschedule at a more convenient time for them.

Rushing the customer is a manipulative sales tactic.  I have been in sales before.

I didn’t do it, but I was aware of how it was done.

I don’t tolerate it, and neither should anyone else.

I always try using a humorous way to get my point across.. 

1) 'whoa there! What's the big hurry?!"

2) hey, I'm kinda slow, so I need more than a nanosecond to process what you are saying!" 

Do not be rushed into anything! If they don't take a good natured hint, then just say you will have to think about it, and leave - don't listen any further as they try to keep you on the hook.. 

One other thing I have learned is this - I make a DEAL with myself.. that no matter how great something sounds, I walk away, even if it is just for a few minutes.. because trying to decide on something with them badgering and making you feel pressured, is only going to make you go along with them - they are professionals, and this is what they do.. so, no matter how you feel, make a deal with yourself to walk away.. just say something like "hey, this all sounds great, but before I sign my name to anything, I am just stepping outside for some fresh air, (or going for a coffee)". 

Do NOT care if they make you feel silly about doing that.. better to look silly, feel embarrassed in front of a stranger, than be pushed into something and regret it forever. 

I just say that I do not want to be rushed, and walk away.

Ask for twice as much as would be fair, or walk away.