Countless people visit Anaheim each year without really being aware that they're actually in Anaheim. How is this possible? The city's main attraction is Disneyland, so the vast majority of people who visit are going to Disneyland - not, in their minds, to Anaheim. While Disneyland is the obvious draw for most travellers, there are a few other reasons to go to Anaheim, or to add to your must-do list once you're there.
Located in southern California about 35 miles southeast of Los Angeles, Anaheim is more than just the home of the second Disney resort - it's also one of Orange County's most populous cities. If the primary goal of your LA visit is to spend time at Disneyland, then basing yourself in one of the hotels in Anaheim is a great option. If, on the other hand, you're hoping to explore more of Los Angeles than just the theme park, you might want to pick a different part of the metro area and consider Disneyland a day trip.
Keep in mind that Anaheim (as well as the greater Los Angeles area) is best seen by car - and yet it can be a frustrating place to be a driver. Traffic is such that the trip from LA to Anaheim can take 2+ hours (when it should take 30 minutes), so it's important to plan your days to minimise the need for driving whenever possible. The closest airports to Anaheim are in Santa Ana (John Wayne Airport) and Long Beach (Long Beach Airport), although the massive LAX is also an option.
After you've exhausted yourself at Disneyland, you can make your way to Anaheim's other amusement park - Disney California Adventure. Between the two parks, it's possible to consume your entire holiday. Should you have time to spare (and an interest in sports), Anaheim is home to two major-league teams - the Los Angeles Angels play baseball at Angel Stadium, and the Anaheim Ducks play hockey at the Honda Center.