Ava the only tips I have are to make sure you have at least one third speed food every meal and eat it first so you fill up on that. The only meal I don't do that with is breakfast where I usually have weetabix and chopped banana, every other meal I make sure I do that though.
When you fancy a snack don't think "how many syns do I have left and what can I eat using them?" Go for free foods and try to snack on them instead. Often I'd much prefer chocolate or something but force myself to eat an apple and once I've eaten the craving has generally gone as I'm no longer hungry.
I save my syns for a packet of crisps at lunch and bar of chocolate in the evening each day so I don't feel too deprived. Hula hoop pufts are only 3.5 syns so I make sure I have them in, curly wurlys are 6 syns, Freddo's are 5 syns and thin dairy milk bars are 5.5 syns so that also allows me a few extra syns left over each day if I need them or if I happen to go over one day I still won't have gone over the total weekly syn allowance.
I try not to have a cheat day too as I know I would binge and eat loads and would then have to spend the next 2-3 days losing what I had put on from binging!
It's been really tough going some days but my desire to lose the weight is stronger than anything else, well it is for now anyway, I just hope I keep up with the willpower.