Ask HN: How does a founder find office space?

As a founder or a startup, how are you finding office space that's right for your company? The options vary from free to expensive, difficult to browse, to time consuming.

Common options are Craigslist, LoopNet, CoStar, a broker, referral, etc.

What do founders and startups feel the best method is for them taking into account budget, special needs for the business, location requirements, etc.?