How can I be a better cook/chef?

Hello everyone, I am back once again, and this time it is a question about cookery, namely professional cookery.

About 2 months ago, I managed to lie my way in to a job as a chef in a local restaurant.

I have never worked in a kitchen before, and now I am basically the chef at this restaurant, working there alone in the kitchen for all but 1 hour of the day when I have some help.

So far, we have been feeding about 80 to 150 people a day, with meals ranging from simple things like a sandwich, all the way up to a T-bone steak.

I have been doing well at my job, even though I am bluffing and bullshitting my way, the customers have been getting their food fast, and no complaints have come back.

However…

This week, the tourism season has hit its peek for the year, and I am now having to cook for about 150 to 300 people a day, with most of that happening 8pm to 10pm.

Since the increase in customers, I am finding it hard to cope. Some customers are having to wait 5 or 10 minutes longer than normal, my presentation on the plate is not so nice, and I am having a hard time managing my time as best as I could.

No one has noticed, no one has complained, and I would like to keep it that way, but I can see now, with it set to get even busier, that I am kind of in the deep end on this one, and could potentially start to have complaints coming in, if I don’t do something and step up my game.

I have learned some tricks to help me, like if I have an order now for a rare steak, and a order later for a well done one, I can save time and just go ahead and start cooking both at the same time, even though they are on separate orders.

I will also use other time saving tricks, like counting in advance how many portions of french fries I need, and then cooking them all in 1 batch to save time, but I could use more tricks.

Do you have any tips, tricks, or advice, or links to useful info, that could help me become a better cook?

I don’t exactly need better recipes or anything like that, it is more a case of managing the time I have to my advantage.

Thanks!