BBC has an interesting article about how people who are synaesthetes can visualize flow of time.

These so-called time-space synaesthetes have superior recall when it comes to remembering when certain events took place. Could it be that they have a “built-in” visualization-association system which helps in remembering without much effort? Think of something like an “automatic” Loci system, spread over several senses, thus adding more anchors for easier recall.

If so, non-synaesthetes could possibly learn and use the Loci system and similar techniques to gain improved results.

There’s also a synaesthesia test battery available on the web. It might be interesting for you if you see words as colors, feel a tactile sensation for a smell, etc.