Anyone considering exclusive pumping should rent a hospital-grade pump. The ones you can buy in the store (even the $300 ones) are not strong enough to maintain your milk supply. I initially was pumping every 2-3 hours around-the-clock, but by 4 or 5 months could go at least 6 hours at night without pumping. After about 5 months I could go 4-5 hours between pumping and maintain my supply.

2) Buy an adapter for your car

In order to be able to leave my home for more than 2-3 hours at a time, I got an adapter for my car. I would bring the breast pump, park in a secluded location, and pump in the backseat of my minivan. It provided so much freedom, and made it more bearable.

3) Order a special bra (readily available on the internet) that will allow you to pump hands-free. 

This will allow you to play with the baby, read a book, use the computer, etc., while pumping. VERY useful.

4) Don't be afraid to supplement with formula, if necessary. 

It was overwhelming at times and I sometimes substituted a feeding with formula just to give myself a break. I knew my baby would benefit from ANY breast milk she received, and I worked hard to remind myself that it didn't have to be an all-or-nothing thing.

Easy Expressions Hands-Free Pumping bustier

Lactation Consultants at my local hospital