This city never sleeps, similarly to me when in London. There is always so much to do and see in London from shows and concerts to eating cultural diverse food and visiting museums. The weather can sometimes dampen your plans, to prevent that make sure you always have a jacket and umbrella with you.
I have stayed both central and on the outskirts of London on my two visits thus far and can say its definitely a personal preference. Renting an airbnb both times, Wimbledon boasted a family environment, cafes and shops as well as a safe surrounding. I would love to some day have a house there although being a bit far out of the city itself it's what I look for when I'm staying somewhere. Last year we booked a beautiful apartment near Euston/Kings Cross Station, it was a small sized apartment but was so beautiful and located very conveniently.I would recommend if you're going to London stay in an Airbnb or a hostel because prices for a hotel can be ridiculous - upwards of $500p/n.
It was very convenient for the tube to stay in the city centre,( the main stations that host more than one line are Kings Cross, Victoria, Waterloo, and Liverpool Street, Euston) busses and a train line also run in the city. You can also drive if you have a car, however the tube is very reliable.
In relation to driving in London, I'd advise not too; there is so much vehicle traffic and you are better off catching the tube or train if you want to get somewhere... Kings Cross station has a fair few lines attached so chances are you don't have to change or it's just one change provided you can stay within the city area.
You'll need an 'oyster' travel card when you're traveling via public transport- you can pick these up at the station and they have daily deals if I'm not mistaken, also if your return the card you get a 5 pound deposit back. (edit 2020: you can now tap on and off with your debit/credit card)
London itself is very big, if you've got a few days I'd say space out your adventures and make sure you explore the hidden gems of the city. Most tourist attractions are accessible by the tube or a short walk so don't stress about buses and trains all that much!
The main sights you'd want to see are Big Ben/ Parliament House (westminster and bridge, circle, district and jubilee line) - if you have time take a walk around, book a tour because I don't think you can tour the building without a tour guide.
Within walking distance you have the London Eye, Westminster Abbey, St Paul Cathedral, The Shakespeare Globe, Buckingham Palace (Green Park - Jubilee and Victoria Line), Trafalgar Square, South Bank, London Bridge (Jubilee or northern Line).
If you don't fancy a long walk there are tube stops along the way. Allow 35 minutes at each place if you can so you can really have a look. Buckingham Palace you can go inside certain areas but it does cost. This is the same with most attractions just be aware of that because they can all add up if you are on a budget. Check out the Shard & Tate Modern if you're around the area as well!
Other places i'd recommend are Nottinghill/ Ladborke Grove, just be smart about when you go because it tends to be busy on weekends. On the bright side there is good eating, so be sure to check it out. If you don't fancy a feed be sure to take a walk and explore the area. North London is also similarly just as casual so if its nice weather you can pack a picnic, and park up near Prim rose hill to watch the sunset over the city, nice if you want to do something different and don't want to spend money.
There is also Paddington basin - they have set up a floating park and canals, be sure to pack some food and set out for the day! East London is Sydney's answer to Newtown. There are endless cool bars, cool things to do, good food. I'd suggest going during the day to familiarise yourself with the area before checking out at night if you're not from the area. There are vintage shops and is classified the 'hipster' area of London.
If you are interested in history and museums which I was, you'd love these suggestions. - Huntarian Museum (Holborn Station on the Central & Piccadilly line) - During Christmas check out the sir john stones, candlelight tour (Holborn Station on the Central & Piccadilly line) - British Museum (Tottenham Court Road on the Central or Northern Line or Holborn on the Central & Piccadilly line) - Nation History Museum (South Kennsington Station on the Circle, Ditrict, and Picadilly line) - Victorian Albert Mueasum (South Kennsington on the Circle, Ditrict and Picadilly Line)
Other Places of Interest: - Richmond park (richmond train station on the district line and overground train) - Kew Gardens (richmond train station on the district line and overground train) - Comic Garden (Piccadilly Line)
I'll be sure to add anymore adventures this year to my London Post so stay tuned! Want to stay where I did? Click here.