My startup company got acquired last week. I’ll get ~ 300K (2017 taxable event). What are things I can / should do to limit my tax hit? (Gifts, other?)

My wife and I file jointly.  We live in California.  Our AGI for 2016 was $230,000.  AGI for 2017 will be similar.  I've held stock in the company since it was founded in 2006.