Congratulations on starting treatment. Its always a relief when you get started I think!
I found AC doable and these are the things that helped: exercise, I walked for 40 minutes every day, I think it helps with side effects, take something preemptively for constipation (I used coloxyl with senna) and there is some anecdotal evidence on overseas forums that claratyne tablets (simple hayfever pills) can help you avoid bone pain related to the neulasta injection. Take them daily from about day 2-5.
Good luck with it!