The easiest (but not cheapest) thing for me to do was the Colonix/Paranil cleanse. It was $150 for 3 months cleansing and free shipping. (I think the price went up now :( I had great results with it, although not everyone does. In the Bowel Cleanse Forum some people post their positive results with it and some have either negative or unnoticeable results.
Humaworm seems to be a great parasite cleanse product. Try checking out the Ask Humaworm forum. approx. $28 for 1 month.
The Barefoot Herbalist has a great product for bowel cleansing. It is called LBB, lower bowel balance, and w/o shipping it is 59.95 excluding tax for 550 capsules. I think this is a GREAT deal. He also makes his de-wormer that you can try also (I haven't). Here's his website (check out the Ask Barefoot forum too):