When I don't blog as often as I'd like to, there are normally three reasons that contribute to my non-blogging moments:
1) Too busy with life. Chores, work, holiday, activities... But, even at my busiest, I do try to make time to record things as best as I can.
2) Unable to get near a computer or the Internet connection's down. While this does happen - especially when I travel - it doesn't happen that often. Thank goodness for that.
3) When my brain becomes a tangle of incoherent thoughts. Or, I get really bogged down with the idea of writing a great entry - and I just end up feeling blocked altogether. The former is difficult to combat. Often, I just try to create lists - like this one - to help me organise my mind. When it comes to the latter - sometimes, it just helps to write anything and to forget the 'great' part of blog entries.
What about you? What contributes to your non-blogging moments?