I haven't tried 1Password or KeePass, but I've used LastPass for something like a year now and it works well for me. Using a small set of passwords across all sites, especially given that easily a dozen websites I've used have been hacked, is just insane. I regret that I didn't start using some password manager long before hand.
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: