Outpatient practice is different than inpatient. When you're in the hospital, you'll go through the entire drawn-out H&P template. In clinic, it's a little less formal.
As others have said, only take a more thorough history on patients who are new to the clinic. Start by asking them about whatever brings them in, but be sure to also cover any major medical problems, medications (ask which ones they are actually taking - looking at a med list is not enough), or other symptoms/concerns. Ask about family history if it's relevant (e.g. for a patient with bloody stool, you should ask about family history of colon or other GI cancer). Most of the time more detailed family history will be on the clinic's intake sheet, so you can just look it over and verify important things with the patient. You should also ask about screening tests or vaccinations that the patient may be due for, which is something you wouldn't generally do on an inpatient service. You generally do not need to do a full physical exam, but listen to their heart and then do a targeted exam if indicated for whatever their concern is. Headaches? Do a neuro exam. Shoulder pain? Do a musculoskeletal exam, and so on.
If it's a return patient, just ask how things have been going since last time. Ask about any major changes in health or hospitalizations. Ask if they need any medication refills or vaccinations, and then do a targeted exam as above.
You can always ask for more specific guidance from your preceptor, but everyone I've worked with has done something very similar to the above. The trick is to collect all relevant information without running out of appointment time.