To request help on a specific area, check which type of psychic is doing the reading. For instance, if interested in contacting someone who has died, you need to consult a psychic medium, which is a type of psychic who specialises in communicating with the dead. Some sites will allow you to post, or email, a question to a psychic, and they will reply to you directly by email, or by posting a message on a message board and you have to keep checking back to see when they have responded.
Some psychics can be contacted through psychic chat rooms and may answer specific questions for you. Some chat rooms are free and can be a good way of getting to know how a psychic works and whether you would like to pay for a full reading from them.
Many websites offering online psychic readings may have free samples or introductory offers. For instance, if you wanted a report on your past lives, you may fill out some information about yourself on an online form, for instance your date of birth, and then the report is generated and they give you a synopsis for free with the option of paying to see the full report. This is good as it allows you to see whether the report covers the kind of areas you are interested in. Websites offering online chat readings may allow you ten minutes free as a sample with the option of continuing if you are interested.
Other types of readings that are free are psychic horoscopes: many astrology websites or general information websites have a free daily horoscope. Some allow you to sign up to have them emailed directly to you. This can be a pain if you don't look at your email very often. Free psychic readings are usually a taster rather than a full reading though.
There are sites where you can get a free tarot card reading or angel card reading - the tarot cards are generated for you and an interpretation given. If addressing a specific issue, or question, you need to apply the reading to that issue yourself. Psychic dream interpretation websites are quite common, they usually give access to online dream dictionaries which are free to use. Free online psychic readings allow you to assess the service offered before you have to pay anything.