Create customer awareness about your shipping policies by highlighting the strong points of the shipping strategy and put up shipping options, fulfillment and return policies. That makes for lesser abandonments.
Offer flexible, mixed shipping strategies, based on the shopping amount, frequency, season, area to be shipped to, certain categories of purchases, etc. Keep the shipping strategies dynamic to customize solutions based on the business analytics. In other words, use data to recognize trends and tweak shipping offers.
Various options that can be taken into account for finalizing the shipping strategy are flat rate shipping, table rate shipping, live shipping from courier agencies, International shipping, using shipping tools, same day shipping, guaranteed within x days/hours, etc.
Also, if you have free shipping options, go to town with it. This is a big differentiator when it comes to drawing in customers.