drop one or two gears and spin easy for the last mile or so - if you're riding/racing more than 80-90 minutes, this won't hurt your average speed enough to worry much. another thing that I have found works is to periodically coast part of the downhills and stretch my calves/hams by straightening one leg on the pedal and forcing it up with the other pedal. little tricks like this will help to a degree, but nowhere near as much as jumping off the bike and beating feet. keep in mind that bricks don't always need to be a substantial distance. regardless of the distance I ride, I will always get off the bike and run a few km until the sensation has returned to my legs - usually at a good pace and high cadence. somedays it only takes 2k, other days it can take as much as 6k.

Thanks for all of the advice. Will strengthening legs help a lot?

This is just a repeat of what everyone else has already said , but I've def found the more bricks I do the easier it gets. Also more brick workouts means I am better able to gauge how hard I can go on the bike and not hurt my run.