do both. When you play correspondance game you have to wait a day for your opponents move anyway. Make a move, play a live game, log off, repeate
Switching to "Online Chess"

Do what you like most :-)
For longer games, I prefer real life action though, so I can talk to the person later on about the game.

A good idea in principle, but you have 26 correspondence games on the go at the moment. How long do you spend on each move? For maximum benefit I would recommend fewer games, spending more time on each move.

My free video lessons group explains how to play correspondence (online) chess in the best wayss. Too many people rush their moves and don't look up the opening. you can gain points easily if you take your time, thus acquiring higher rated opponents so you can learn by playing them. My most recent Youtube playlist already features over 90 quick videos on an ongoing match. You will learn plenty from these.
Autojoin my group here: http://www.chess.com/groups/join?id=14246

Correspondence Chess takes too long
When I played by postcard from 1980 to 2000. it took at least a year aganst a domestic opponent. But I learned a lot about openings, middlegames, analyzing, planning, etc....Now, no post office holding the moves, you finish much quicker, but you can still learn a lot. You get to study chess as you play!
After hundreds of "live" chess games on the site I think that it will be beneficial for the growth of my game to play correspondance. I will still use "live" as a bit of a playground but I will not be to worried about my rating.
Thoughts/views?