As most folks, I use a combination of tools. Anything 'interesting, but not sure what to do about it, gets +1'd and I then rely on Google to serve it back up to me via personalized search results (or search history, or the +1 list on my google profile) when I need it next. Anything really interesting gets shared on G+ which again promotes it in the google search results (or I can go look in G+ search, and filter the results to 'From You').
I clip stuff to +Springpad
with the bookmarklet (not the extension), which lets me file to one of a few notebooks (ToDo, Reference, Someday), and add tags to assign projects and contexts. Springpad have broken quite a lot of stuff in their upgrade to v3, but they're working to fix issues.
I've tried Evernote for this, but prefer the look and functionality in Springpad. I've also used Catch in the past, but now prefer it just for editing text over bookmarking (because save/sync is robust, and you get a big text window to edit in).
For work I use Outlook tasks - because when I'm working I have a PC open 90% of the time. I used to use Outlook for personal stuff, but lately I find I prefer to turn Outlook off when I get to the weekend.
Interested to hear what the rest of the community comes up with here.