I've pretty much only played FR... just clocked by 200K hand a week or so ago. Currently at $25NL and running okay long-term.

I'm thinking of spending some time in 6max 'cause I believe there are some skills I can pick up there that will help me in my FR game. Right now I'm thinking -

1) Increased 3-bet/4-bet aggression
Both initiating and responding too. Not much 3-betting happening in FR at the levels I've been playing at, and I think getting better at doing this more (and more comfortable responding to it) will be helpful
2) Opening up in LP
Getting comfortable pushing the LP aggression w/ a wider range. I figure with blinds coming around much quicker in 6max, I can work on really opening this range up aggressively and getting better at working thru the post-flop action when people refuse to be stolen.
3) Post-flop in general
I'll just see more hands, more situations, etc in a shorter time. I also get the sense 6max is less nut-camping than FR, so I'll pick up experience playing more streets in thinner value scenarios.
4) Opp profiling
Fewer people at the table means I can pay more attention to each of them. Get better at note-taking and applying this to my reads n' ranges.
5) Blind defense
Also get the sense that blinds is stoled more in 6max so I can get better at picking the right spots to fight back.

Thoughts on these? Other things I can look out for / focus on?

Will be starting with $10NL and see how it goes...