Everyone thinks, speaks, or writes in real time. There is not even a moment sometimes to consult a rule or definition — we need a natural and effective way, to manage own grammars. Language MappingTM has proved the best, to me and quite a few other people, because it invokes human natural capability for logic. Try a mild brainteaser. More→
The grammar way may prove most effective step-by-step. Feel welcome to the menus as well.