The easiest way to search is to make use of Google's site-specific search. Rather than just searching for your query in Google, you prepend it with site:lifehacker.com. If you were searching for security, for example, it would look like this:
Still, that isn't exactly the simplest way to search. What works a lot better is if you add this site-specific search to your saved search engines. In Chrome, this will let you search directly from the omnibar. In Chrome, just right click the omnibar and choose Edit Search Engines. Click the + to add a new one and enter the following:
- Name: Lifehacker
- Keyword: lh
- URL: http://www.google.com/search?ie=UTF-8&q=site:lifehacker.com+%s
Save it, and now you'll be able to type lh in the address bar and then type in what you want to search for. The results you'll get will be much better than what you'd get with the currently disabled search on Lifehacker, so if you find yourself commonly searching Lifehacker it's a good search to set up.