I agree with both Dukali and Greenwitch what you should gain a firm grasp of the basics before attempting spellwork. Lest you risk overcomplicating matters.
May I advise a dalliance with hypnotism? It would help to enter your mind, view that which you've deemed most important to you, and allow you to determine why the specific memmory/aspect is so very critical to you.
By understanding the greater desire or bond to a concept, or memory, you can better recreate, even re-experience such things as you move forward in life.