General

American Society of Clinical Oncology Survivorship Guidelines
Lots of resources provided on the link below. 
https://www.asco.org/practice-guidelines/cancer-care-initiatives/prevention-survivorship/survivorship-compendium-0

American Cancer Society 
Resources available for primary care providers including new guidelines on breast, colorectal, prostate and head/neck survivorship care. 
http://www.cancer.org/treatment/survivorshipduringandaftertreatment/nationalcancersurvivorshipresourcecenter/toolsforhealthcareprofessionals/index 

National Comprehensive Cancer Network (NCCN) Guidelines
Disease specific guidelines, including those focusing on cancers in the adolescents and young adults, include variable information about survivorship care. Access is free, but registration is required. 
http://www.nccn.org/professionals/physician_gls/f_guidelines.asp

National Cancer Institute / Office of Cancer Survivorship
Links to the above clinical practice follow-up guidelines from the National Comprehensive Cancer Network and the American Society of Clinical Oncology.  
https://cancercontrol.cancer.gov/ocs/

National Cancer Institute / Cancer topics
Summaries on a wide range of topics including a registry of open and closed cancer clinical trials, a directory of professionals, a dictionary of cancer terms, and information on cancer-related therapies.
http://www.cancer.gov/cancertopics/pdq

Another way to search for information about specific cancer types.
http://www.cancer.gov/cancertopics/types/alphalist

Centers for Disease Control and Prevention (CDC)
Information and resources available on a variety of cancer survivorship topics, disease specific links available.  
http://www.cdc.gov/cancer/survivorship/

Cancer.net / Survivorship
Overview (created for patients but useful for primary care providers) of various aspects of cancer survivorship. 
http://www.cancer.net/patient/Survivorship/Late+Effects

American Institute for Cancer Research
This organization funds research and provides practical tools and information for patients and health professionals.  Focus is on healthy lifestyle habits. http://www.aicr.org/health-professionals/

Survivorship care plans  

The Institute of Medicine recommends that all patients who complete their cancer treatment are provided with a survivorship care plan that includes information about their treatment, plans for follow-up, possible late effects, resources, and care coordination.

Several organizations have developed programs to create survivorship care plans for patients. (See Key Resources)