Henry Bolduc has a free ebook on self hypnosis
Self Hypnosis
Some very basic tips for self-hypnosis:
When making your own script/tape, I recommend choosing words and phrases that excite you. You can use someone else's script but change it slightly to be more personal and relevant to you. Incorporate as many of the 5 senses as possible, to make it very real. Only use positive words expressing what you want, not what you don't want. Use present tense instead of future tense.
Have fun~