[rewboss]

One of my favourite methods is to draw timelines. I find making them as witty as possible helps, although that might depend on your artistic talent.

A timeline looks like this:

-------------------|-------------------->

Then you label the respective parts "past", "present" (or "now", if you prefer) and "future". You can then draw little pictures at the appropriate places.

For example, to illustrate the present perfect, I take a sentence like "I have made a cake". Somewhere on the "past" side of the timeline I draw a little stick figure with a mixing-bowl and wearing a ludicrous chef's hat. In the middle -- "present" -- I draw a recently-baked cake, perhaps with candles (works especially well if it happens to be somebody's birthday), and an arrow connecting the two. I use this to explain that the present perfect connects the past with the present.

Obviously you can't rely on that method alone, but I find that many people need something to look at. If you make it amusing, people might remember it better.