A lot of great answers here. Mine will be brief.
B2B sales "growth hacking" is not a silver bullet. Your sales strat will work best when it compliments your organization, team, and product. First take a deep dive into your sales funnel and analyze how leads are being generated, how they are being lead to close or nurtured through the process and what your conversion rate is.
Next, find a system that works best for your team. Have a great programmer? Enhance your solution w/ upsell strategies. Have a suave guy who can make butter out of cream? Get him on the phones and start creating relationships.
My suggestion would be to Identify potential partners who have close relationships with a large # of leads, make a mutually beneficial proposition and tap into their leads. I have a friend who started working for a large real estate company. His role is to buy property and have it converted into assisted living homes. Not sure if it would help, but I'm happy to make an intro. Just PM me.