Always have reflectors, setup the scene, then look in the camera to see if the camera thinks there's too much contrast in the scene... if there is, expose for the light bits and light the dark bits to suit that exposure.
Simple, this is the same process for every location, not just outdoors. Expose for the bits you can't control, then control the parts you can to match.
Use your eyes... if you look at the camera and see that it looks wrong... IT'S WRONG. If it makes you want to post a question, it's probably something that you can fix on set with a simple question/answer: example -- Is the actors face too dark? I'll add light to the face to see if it looks better. You've determined the assumed problem in the question, and by reversing the case, tested the hypothesis. Perhaps the background is too bright. You can do one of two things... add light to the foreground or remove light from the background. Once they're balanced, expose to the subject and move forward with your shoot.
Schedule time for this process so you can get it right on set and not have to worry about it in post when you should be more focussed on storytelling than fixing problems that should have been addressed on set.
One of the drawbacks of most small crew indie fare is that the filmmakers don't counter their lack of crew by scheduling more time to account for the lack of crew. It's simple person hours accounting math. 5 people doing a job in 1 hour would take 1 person 5 hours to do the same job. A camera crew is generally 3 people (op, focus, slate). A lighting crew for me is generally 5 people (Gaffer + 4 grips). If you're the only one on your set doing these tasks... every setup will take you 8 times as long to get going. Schedule accordingly.