FOOD = FUEL
80% food, 20% exercise
Weight loss and being healthy is mostly about what you put in your body - everyday. Exercise is important, but it is only 20% of what you need every single day. If you have weight to lose, and you have only just begun your journey, then the first thing to tackle is your mindset. It may feel like a mountain too high to climb - the number of kilos you need to lose is too much and it all feels like too much hard work. The thing to remember is to set yourself some achievable mini goals. This may be something as simple as saying "I will switch to grain bread rather than white bread for 1 week". 1 week challenges are much easier than trying to set yourself a 6 month, or 12 month challenge. Just take it week by week and monitor everything you do, so you can compare and evaluate what works and what doesn't work for you.
When you have a bad week—as every one does at some point—it's about getting back up again instead of letting everything go.
Having a personal trainer can help you keep on track and encourage you to keep going when you're not feeling it. If you don't have a personal trainer, then try and find someone who can support you and who makes you feel good about the changes you are trying to make. Start today, not tomorrow.