Step 1: Remove the Wheel

• It's much easier to fix a flat if you first remove the wheel from your bike. 
• Release Your Brakes. Most brake assemblies sit very close to your wheel rims and use a quick-release system to disconnect and reconnect them. The exact location and design of these release systems will depend on your style of brakes.
• Front wheel: To remove a front wheel, simply open the quick-release lever and unscrew the securing nut slightly on the opposite side as needed to release the tension holding the wheel in place.
• Rear wheel: Removing the rear wheel is almost as easy as removing the front wheel, but the chain presents an added complication. Before removing your rear wheel, shift your chain onto the smallest rear cog. Turn the bike upside down, then turn the rear axle quick-release lever until it's fully open. Pull back on your rear derailleur to give yourself some slack, then lift out the wheel with your other hand.

Step 2: Check for Damage

• First, release all of the remaining air from your flat tyre. Next, unseat your tyre bead using the following procedure:
• Using tyre levers, start on the section of your tyre opposite the valve (to avoid damage to the valve stem). Use the longer end of one tyre levers to pry the bead of the tyre up and over the edge of the rim.
• Once a section of the tyre bead is free, you should be able to unseat the rest of the bead with your fingers. Remove the inflatable tube from beneath the tyre by pulling the valve stem out through the rim first.

Finding the Cause of Your Flat Tyre

• Tube damage can be difficult to spot. If you don't see any obvious punctures or blowouts, try inflating the tube so you can check for escaping air. To find very small leaks, pass the tube close to your eye or submerge it in water and look for bubbles.
• If you can't find any tube damage, check the valve. 

Step 3: Repair/Replace the Tube

• If your tyre has sustained little or no permanent damage (as is often the case), your decision will be whether to repair your tube or replace it.

Step 4: Reinstall the Wheel

• Simply reverse the procedure you used to remove it. 
• Finally, flip the bike right-side-up. Be sure to reattach your brakes before riding!

Be Prepared

1. Carry a spare tube: Just make sure you have the right size. 
2. Carry a patch kit: This is a compact and economical alternative to a new tube. The downsides? They are more hassle and offer a somewhat less durable solution.
3. Carry tyre levers: These easily fit into even a small under seat bike bag.
4. Carry a pump: Some flats can be avoided by simply riding on tyres that are properly inflated. Check your air pressure before every ride.

1. The first thing you do in the morning is turn on the computer
2. You won't go on holiday to anywhere that doesn't have internet, power or phone lines
3. You are still on the computer at 2am from 2pm the day before
4. You check your email. It says "no new messages." So you check it again
5. You wake up at 3 a.m. to go to the bathroom and stop and check your e-mail on the way back to bed.
6. You know your online friends better than your real ones
7. You don't have a diary, you have a blog
8. You are surprised when you go to the library and can't find Wikipedia
9. If a coffee shop doesn't have free wifi, you don't go there
10. If your computer crashes, you go to bed because there's nothing else to do