Push your bike forward when you sit.
Whenever you're standing and pedaling, don't just plop back onto the saddle when it's time to sit again.
Instead, as you lower your butt, extend your arms to push the bike forward. This simple trick gains a few inches every time you use it.
Prove it to yourself by trying it next to an unknowing rider. Watch your front wheel move ahead. Also, by pushing your bike forward, it puts the saddle under your sit bones so you're perched in the right place.
This slick little move will mark you as a skilled rider. The idea is to do it automatically while continuing to pedal smoothly. Why not? It's free ground!