Originally posted by Pelirrojo
You may also just be hitting a slump. I find that DR (dream recall) goes in cycles. It comes and goes, but if you keep at it, you will get better and hopefully the bad streaks will go away altogether.
I also find this to be true. Sometimes I'll recall several full-scale dreams in one night, and sometimes I'll wake up with only a couple flashes of a single dream. Just keep writing down whatever you can remember. No dream is too unimportant to record.

As some others have said, stress can play a part in decreased dream recall. Also, when something is new and exciting, you always perform better than when the newness wears off.

I always forget to do reality checks, too. I was reading EWOLD last night and it was talking about doing reality checks to increase your memory to make MILDing easier. I memorized the reality check targets last night, and do you think I remembered them this morning? No. But I just have to keep trying. My memory sucks ass.