Don't Waste 4 Profitable Opportunities from Mayor Daniel and his City:
After the useful introduction to Mayor Daniel during the initial tutorial and early levels many players completely forget about Mayor Daniel, I know I did this up until I reached the levels where the Trade Depot and Global Trade HQ are opened up when I realized what an opportunity I had been wasting.1) Hitting Daniel's Trade Depot every 24 Hours
Every single day you have the chance to buy a range of 6 items from Mayor Daniel's Trade Depot - at least half of these items will be hard to come by or hard/longtime to make and all of the items will be selling at RRP (Recommended Retail Price) which means you can either use them to upgrade buildings or you can jack up the price by 10 to 100 per item, sell them in your Trade Depot and make a quick 500-1,000 Simoleans every 24 hours.2) 48 Hour Trade Depot Buyback

Later on in this website's "Tips & Tricks" Section I will go into this in more detail as part of an ongoing profit strategy but for now just remember your Trade Depot always has a cash buyer just waiting to help you out.
3) Making New City Connections with Friends/Neighbours
One of the key points of introducing Mayor Daniel to you early on in the game is to encourage you to connect via Facebook with your friends or other existing gaming acquaintances in order for you to build up a group of neighbouring cities who can form a trading block for both buying and selling your items without having to compete with tens of thousands of other players in the Global Trade HQ. Buying and selling with your neighbours is less of a hassle and you can come to arrangements about pricing and helping each other out with hard to find upgrade items or expansion/storage materials.
4) Learning Layout Opportunities from Mayor Daniel's City
Even just a fleeting glance at Mayor Daniel's City should give you an idea of how a decent City Layout should be done and if you are willing to spend a little time studying it you can pick up a lot of ideas how to optimise your city from day one with residential zones kept far away from industrial zones and with a buffer zone made up of shop and non-polluting units. What's more his city is optimised for future growth with plenty of free space available for residential and specialised service units.For a general overview on City Layout check out this guide for more suggestions: http://www.simcitybuildit.info/2015/02/optimizing-your-simcity-buildit-layout.html