Most people who visit Muir Woods spend a short amount of time walking a portion of the two mile path from the entrance and purchasing food at the small canteen area near the visitor's center. For this reason, the are is very crowded. Your best bet for seeing Muir Woods is to have your own transportation so that you're not restricted to a quick one hour visit, most of which will be spent walking behind the masses of agonizingly slow moving crowds and restricting your ability to see much of anything.
Unique Suggestions: If you do go here on a tour, your best bet is to leave the main path and hike a bit on the trails that lead upward and away from the crowd. The two trail are 4 or 5 miles long, so a one hour visit isn't enough time to hike either. But you can go a distance on either of these trails and get a chance to immerse yourself in the woods and the scenery, giving yourself more of a nature experience.
Most people arrive by tour bus and pass a great portion of their time at the visitor's center and the canteen area. I find that most visitor's centers offer some interesting information about the history of the park and the plant, animal and even human life that inhabited it. I found this out while stranded at Bryce Canyon during a winter snowstorm and personally learned a great deal that day, and not just that leaving South Florida is December is a bad idea.
But, my point here is that there is little or anything useful about the visitor's center at Muir Woods. It is a tiny space devoted mostly to selling books and souveniers that can be purchased anywhere. Do not waste your time here, especially if your time is limited.
Unique Suggestions: If you insist on doing this, then buy yourself one of the books on the other national parks in the US. It will give you something interesting to read on the bus ride back.