There are a lot of things to consider once you find the space and begin negotiations. The one thing two of my clients learned the hard way: Negotiate a termination clause.
When you're signing the lease, you're excited about the space and you want to get a good deal on the front end. It's easy to forget about the "what if's".
What if you outgrow the space before the end of the term? (hint: look for space that would be easy to expand into a neighboring spot or stay within the complex) What if you need to get out of the lease for other reasons, what are the requirements?
Often, you'll have to give up some of the free rent or other perks to get the termination clause. I have successfully negotiated termination clauses that were equal to 2 months of rent after the first year. The other option is to sign a shorter term lease.
~Kelly

