Asking for comments increases the probability you'll get any. :P Also asking questions usually help to.

As to guaranteeing comments every entry... uh no. ^^; Continue doing daily life entries, continue mentioning future plans, because with a small readership like most LJs have, comments are absolutely not guaranteed. S'just true. ;.; Though you could cater to the majority of your audience and always be a yaoi fangirl, for instance...