Brief Summary: This clinical trial studies the effect of four different intervention components "tools" on body weight, nutrition, and physical activity in cancer survivors. Studies indicate that people with a history of cancer whose nutrition and physical activity habits are consistent with the American Cancer Society's Nutrition and Physical Activity Guidelines may have longer disease-free survival. The four different intervention components may help patients with a history of cancer adopt recommended health behaviors after they have completed treatment.

Detailed Description: PRIMARY OBJECTIVE: I. To determine the effect of four candidate intervention components (text messaging, digital health tool kit, health coaching, or support person training), and combinations of the four intervention components, on change cancer survivors' American Cancer Society (ACS) guideline score after 48 weeks of intervention. SECONDARY OBJECTIVES: I. To determine the effect of four candidate intervention components (text messaging, digital health tool kit, health coaching, or support person training), and combinations of the four intervention components, on cancer survivors' American Cancer Society (ACS) guideline score after 24 weeks of intervention. II. To determine the effect of four candidate intervention components, and combinations of the four intervention components, on cancer survivors' intake of fruits and vegetables, whole grains, refined grains, red meat, and processed meats; moderate-to-vigorous physical activity; and body mass index (BMI) after 48 weeks of intervention. EXPLORATORY OBJECTIVES: I. To determine the effect of four candidate intervention components (text messaging, digital health tool kit, health coaching, or support person coaching), and combinations of the four intervention components, on cancer survivors' American Cancer Society (ACS) guideline score after 12 weeks of intervention. II. To describe adherence to each intervention component. III. To explore the effects of each of the candidate intervention components (text messaging, digital health tool kit, health coaching, support person training) on theoretical constructs (e.g., self-efficacy, outcome expectations, self-monitoring, social support) from 0 to 24 and 48 weeks. IV. To explore whether sociodemographic (e.g., gender, age, race/ethnicity), clinical (e.g., stage of disease, treatment history, ostomy status, time since diagnosis), and/or psychological/behavioral (e.g., self-efficacy, social support, outcome expectations, depression) factors moderate the intervention components' effects on ACS guideline scores. VII. To explore change in ACS guideline score in relation to change in fasting insulin, glucose, homeostatic model assessment (HOMA-IR), and inflammatory markers (e.g., Interleukin 6 (IL-6), high-sensitivity C-reactive protein (hs-CRP), Tumor Necrosis Factor alpha (TNF-alpha) from enrollment to 48 weeks among people with a history of cancer. VIII. To explore change in ACS guideline score in relation to change in fatigue, depression, and sleep quality from 0 to 24 and 48 weeks among people with a history of cancer. IX. To explore changes in the ACS guideline score in relation to change in the gut microbiome among people with a history of cancer. OUTLINE: All patients receive a personal report comparing their nutrition and physical activity to ACS guidelines and a booklet on nutrition and physical activity for patients with a history of cancer. Patients are randomized to 1 of 16 conditions. CONDITION I: Patients receive text messages and use digital health tool kit for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION II: Patients receive text messages and use digital health tool kit for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. CONDITION III: Patients receive text messages and use digital health tool kit for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION IV: Patients receive text messages and use digital health tool kit for 48 weeks. CONDITION V: Patients receive text messages for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION VI: Patients receive text messages for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. CONDITION VII: Patients receive text messages for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION VIII: Patients receive text messages for 48 weeks. CONDITION IX: Patients use digital health tool kit for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION X: Patients use digital health tool kit for 48 weeks. Patients also receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. CONDITION XI: Patients use digital health tool kit for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION XII: Patients use digital health tool kit for 48 weeks. CONDITION XIII: Patients receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION XIV: Patients receive 15 health coaching sessions over 30-45 minutes each for 48 weeks. CONDITION XV: Support persons receive four coaching sessions lasting 30-45 minutes each, approximately every 12 weeks for 48 weeks. CONDITION XVI: Patients receive personal report and booklet only.