From your ticker, I see that this is your first trip. How many days are you going for?
My normal advice to first time visiters is:
1) Please remember that you will not see everything! Enjoy what you do see instead of worrying about what you don't get to.
2) Take time to enjoy the magic, scenery, etc.
3) Have fun!
Since you are also going solo, my tips are:
1) Don't be afraid to try out the table service restaurants. I normally bring some reading material, but most of the time I just people watch.
2) Give yourself some flexibility so that you can "do what you feel like" atleast some time
3) Again, have fun!