I'm playing less, let's see if my list helped me:
1) Play a needed class. One common refrain to the shortage of tanks posts is "there is no shortage of tanks, just a lack of tanks wanting to pug". And this is where I sit. It's not because my gear is great and I feel above pugs, I just realized I don't like being the "leader" often. And that's what most pugs required, someone to lead them through instances. For instances I felt comfortable with (usually stuff I outgeared) I was okay with it. But if I'm struggling to tank I don't want to have to tell everyone what they need to do. So in the end I quit doing 5-man instances for the most part.
2) Focus on one role. Well if catbear is a role I focused on one. As I mentioned in #1 I quit pursuing 5-man instances so focusing a role didn't matter. I was 99% cat and 1% bear (Galvanger and Drek'thar). If you don't group you don't have to be a bear much.
3) Do not raid. The Kara group I raided with had a better geared druid come back (for badges) and I ended up sitting out enough that I quit showing up. The Gruul/Mags impromptu raids disappeared.
4) Do not pick up a crafting profession. I'm still a gatherer. I want to mess around with inscriptions but that's not until WotLK.
5) Get loot through crafting, reputation and pvp. I grew tired of the pvp "welfare" gear grind. I don't even see myself going through it in wotlk if Blizzard decides to keep that type of stuff in the game.
6) PvP marginally. See #5
7) Grind reputations that only give rewards I can't easily get anywhere else. Haven't done anymore reputation grind except Scryer because I was so close to finishing.
8) Give up on fun frivolities I'm not sure why I listed this one in the beginning, what is this game but a fun frivolity? I have the most fun questing with a friend. But sadly I think we've run out of most of the quests we can do as a duo. Pretty much what is left is only group and raid quests.
So I'm playing less but I don't think its as much a result of following this list as it is just how things have worked out.
15 hours ago