As xmasbaby pointed out, most things don't take effect until 2018 (tax returns filed early in 2019).
The few noteworthy items I noticed that do affect 2017 (but don't affect most people) are (1) 7.5% limit for Medical Expenses (down from 10%), (2) Increased Section 179 limits for business assets, and (3) 100% Bonus depreciation for newly purchased business assets after September 27th, 2017 (and it is allowed for newly purchased "used" property).
