Every now and then it's a good idea to perform some maintenance on your which is something I've had to learn for myself recently, and since I've never done it before I tried looking for a basic tutorial but could never find one so I'm using the knowledge that I've learnt to create this bike maintenance Instructable for beginners.
Step 1: Materials
Replacements for any broken parts.
Step 2: Washing the Bike
The first thing you will want to do is to wash your bike. When you are washing your bike you first start off with hosing the whole bike down, and once you are done with that you then use some soap, water and a sponge to clean off any dirt that didn't come off the first time especially, on the drive train.excess
Step 3: Greasing the Chain
Once the bike has dried grease the chains and the gears to make sure everything moves smoothly.
Step 4: Pumping Your Bike
When pumping your bike with air you need to make sure you use the right amount of pressure for the right bike. For a mountain bike the tire pressure should be at 30 PSI and 80 PSI for a street bike.
Step 5: Further Wheel Maintenace
If you wheel does not turn smoothly you should first try put some grease where the wheels are connected to the bike, and if that does not work a replacement wheel is needed. There should either be some bolts or a lever in the center of the wheel that you can use to take it off if necessary.
Step 6: Safe Riding
If you have any question ask it in the comments section and I would try my best to answer them.
Links to images I used: