Hi, Friends - being quite new to DBII myself, I thought I'd pass along a few "lessons learned" for others. Most of all, have fun!
An excellent resource for learning many of the ins-and-outs of the game, suggested strategies and the like, are to be found in the excellent DBII manual which you can download at www.mythological.com It downloads as an html file which you can then view/study offline. Although I've had to ask for hints when I've really gotten frustrated or stuck (thanks, guys!), I keep reading through the manual to pick up more knowledge about how to play and what kinds of situations I can expect to occur.
Another other tip is to really pay attention to what the King and other characters tell you about your current quest and follow their directions exactly, because there are usually clues in the text that will make sense later - jot them down in a notebook if you want. Many of the panicky questions that are posted from new players have already been answered - or can be answered - by the King and bartenders when you tip them. Again, listen to the directives give to you and follow them.
Another tip is to always approach any skulls in the walls throughout your quests. They "speak" and will offer you important information.
Give yourself time to solve a particular puzzle before you really give up and ask for a hint from the forum. Take a break, put the game down and think about the current puzzle you're working on and what strategies you might not have tried yet.
You can also go to the forum's website, click on messages and you'll see a search box for message archives. You can put in something a keyword for something you're struggling with. Chances are, someone else has struggled through it too, and all the messages relating to that issue will come up. Try not to read the "spoilers" though unless you're so stuck that you simply can't make any more progress in the game.
I hope these tips will be helpful.
Regards, "Texas Nan"