To log or not to log, that is the question.

Suppose your applications don't necessarily lend themselves to using transacions. For example, simple data entry single row inserts, updates, deletes. Is it worth using transaction logging in this context? Would the only benefit be that you could do backups of the logs and therefore have incremental backups since your last "big" backup? If you dont use logging how big should logical logs be? By the way, please feel free to beat me up and tell me I'm a fool for not using logging (as if I need to ask :) ).