I am 12+2wks with DC3, I breastfed DS1 for 7 months and stopped after my supply went down when I returned to uni, so with DS2 I really wanted to bf for a year but only made it to 9 months because again my supply went down due to mix feeding untill I had no milk left! 
So next time with DC3 I really am determined to get to at least 1yr bf, so I am wondering whether in the early days when milk first comes in whether it would be a good idea to express after feeding to empty my breasts then I could freeze the leftover milk for future use?
With DS1 he fed for 40 mins every 1 and half hours so I had no problems untill I started mix feeding when I returned to uni when he was 6 months but with DS2 he only fed for 5 to 10 mins every 3 hours!! So my breasts were very full even after feeding which led to me suffering really badly with mastitis so by the time he was 2 months I just needed a break and started giving him a bottle of formula every day, I should have asked for help when after a few months my supply was becoming more and more affected but I was embarrassed, I thought they would think I was a failure etc for not ebf! 
Sorry this is so long but I just really don't want the same to happen again and wondered whether expressing and freezing the extra milk in the early days would be a good idea and maybe prevent mastitis as my breasts wouldn't be so full?
Thanks in advance.