Keeping some patience in mind will help. It's doubtful you'll be fluent in Spanish within 24 hours. Even if you had all the vocabulary and verbs remembered, your sentence structure may need a little work. You'll get nowhere fast if you put a lot of pressure on yourself to speak fluently in too short a time. So allow yourself to slowly learn. Doing this will let you feel more comfortable with learning. It's also good to learn slowly is because people will have more patience with you if they know you're trying to learn their language. If you talk like you're completely fluent, and you aren't, you could easily offend someone.
Be sure to work on your listening skills for any language. A lot of languages tend to be more 'oral' than written. You will still need to learn how to 'hear' a language as long as it's still alive. Memorizing the alphabet, or writing a proper sentence, only takes you so far. You'll still have to understand it when you hear it spoken. The best approach is to listen to the language as much as you can. When you get to the point where you can correctly identify Spanish after hearing just a few words, then you'll be on your way to success.
Create an organized system to learn the language. Learning a language doesn't have to be hard, but you have to use one system or another. Like learning most things, the best approach is to follow a step by step method. It's best to start with more basic things, like the days of the week, hours on the clock and simple phrases. Learning vocabulary before grammar makes the learning process easier. Whether you are using a book, tape or video, follow it as much as possible the way it is presented. If you follow the courses as they are set out you'll have an easier time learning Spanish.
Skipping around will only slow you down and make it less clear. You want to learn the language as quickly as possible, don't you? Learning Spanish is a great idea, but maybe the hardest part is finding good ways to learn it.
You may consider buying a language book from your favorite bookstore. You can get to know people who speak the language, or you can take a class. You have many options if you want to learn any language. Have fun with it!