Ideally, upgrade to W7 or W8.1
If you wish for an easy learning curve go for W7 as W8 won't be around long anyway (W9 is coming). Microsoft says that support for W7 will be around until 2020. As far as I know, they didn't say the same for W8.
Run Windows advisor before upgrading to W7 (or 8) if you decide to make the switch from XP, as some older computers will not be suitable without hardware/program modifications. A new PC might even be cheaper.
If you must stay with XP for gaming, often used program(s) you can't do without that won't work on W7, can't afford the move yet or you are just an XP fanatic, consider these recommendation to stay secure as possible.
1. Make sure you do a regular XP Operating System backup or shadow copy onto an external USB hard drive
2. Disable Internet Explorer and use another Browser such as firefox or one using the firefox engine like Sea Monkey or Pale Moon (wait until final XP update before disabling IE).
3. Set your new default browser to ask what to do with PDFs rather that just opening them
4. Try to use a router that has it's own firewall
5. Un-install any 3rd party software unless really needed
6. Un-install Java unless required
7. Isolate or air-gap networks on XP from other PCs
8. Make sure to download the final Microsoft XP updates before support is finished
9. Consider installing Malwarebytes Pro edition and WinPatrol PLUS to add a further layer of protection to an XP supported Anti-virus program (MSI has extended support for XP until next year).
10. Don't use Outlook Express as your mail handler. Postbox Express (or your choice) is simple and reliable to use. Combine it with Mail Washer or a similar spam filter.
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Worth noting is that 95% of the world's ATMs run on XP and most still will be after April 8th.
China prefers to stick with dying Windows XP rather than upgrade, as do many users in third world and other countries with a large poor populace (USA lately?
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One thing for sure, many people will not follow any of this advice (and for some even WITH following this advice) and as a result , I'll concur with what Bill Pytlovany of WinPatrol PLUS says:
Millions of Windows XP machines will soon become malware infected “bots” sending out spam and attacking computers across the world with software vulnerabilities as soon as they’re found.
I still have some use for my XP OS, but It will be disconnected from the internet after April the 8th.