We've talked about this before. Journaling your food is as simple as it gets. You eat something, your write it down. A better strategy is to write it down and then eat, but either way works. As easy as this is, I constantly get excuses from clients why they didn't write down their food. No time - I forgot - I didn't have a pen handy. Then they wonder why they are not losing weight. If I we don't know how you fuel yourself, there is no way to tell why you're not losing weight. Food is an integral part of working out. Energy in (food) has to be equal or less than energy out (calories burned) to create weight loss. The only way to reliably know what you ate is to write it down. Not rocket science.
Stop giving yourself an excuse to not lose weight. Stop sabotaging your efforts for a healthier body. Own up and measure up.
WRITE IT DOWN.