I humbly believe the negatives of Wikipedia are greatly over-exaggerated.
Yes, there are stubs and low-quality articles that may get their sources from questionable places, but these articles are rare.
The vast majority of the articles are well-written, neutral and concise, and get their references from a variety of peer-reviewed articles and official documents written by professionals.
Even articles that may have issues give a brief warning at the top of their page to alert you of the fact not everything you're reading may or may not be accurate, for one reason or another.
And, forget about those who claim 'Anyone can edit it, so it must be bad!'
The vast majority of edits are carefully monitored, vandals are quickly and swiftly stopped in a matter of minutes or hours, and articles high-risk for attacks are locked or restricted only to the most trustworthy of users.
Wikipedia in itself is a good starting point.
Besides, sometimes finding sources from other places online doesn't make it reliable either.
Not every article or piece of information you'll find will be peer-reviewed.
If you're researching history and find a page on it, for all you know it could have been written by one single 'historian' who makes up false credentials and is actually just a freshman/first-year historian major at college.
A rule of the internet: Nothing can be considered 100% true, but some sources are more trustworthy than others.
Even if the World Health Organization themselves officially said there's going to be a virus that causes a 'zombie apocalypse' it's possible the site was hacked, the person who wrote it is a liar and will soon be fired, or it's a total hoax that news articles are falsely circulating around the internet.
Just google 'X celebrity dead' and some article, somewhere, that doesn't look like it was written by a random person but a news site, will confirm it even if it's a lie.
Try it on anything. Google whatever opinion you want, and some biased news article or something that comes across as an offical source/reference will confirm your beliefs.
I find Wikipedia is constantly bashed by institutions. As if to say Wikipedia is just BAD BAD BAD, NO NO NO.
I don't think this. I find its credibility average. Not good, or great, but it's certainly not the most horrible source in the world. It's obviously better than getting your information from Yahoo Answers, Quora.com, About.com and such.