It's a new year, which means it's time to make resolutions, take on fresh challenges, learn new things and change our lives for the better. Perhaps you want to lose 10 pounds, travel more, or get the job you really want?

Mashable has been building a vast archive of how-to guides on everything from professional networking to planning a vacation online — what better time to release a combined list than at the beginning of a new decade?

If you're looking to improve your life in 2010, we hope you'll find these 40+ How-To guides useful. You can find even more How-To guides and tips in the How-To section of this site.

Professional Goals

Many professionals today are primed to leverage online tools for success in 2010. Here's a list of resources that will help you increase your ROI, whether you're a novelist or a PR rep.

HOW TO: Implement a Social Media Business Strategy



HOW TO: Measure Social Media ROI



HOW TO: Track Social Media Analytics



HOW TO: Build the Ultimate Social Media Resume



HOW TO: Launch Your Own Indie Journalism Site



HOW TO: Plan and Promote Events With Social Media



HOW TO: Make Social Media Work for Non-Consumer Brands



HOW TO: Use Wikis for Business Projects



HOW TO: Use Social Media in Your PR Pitch Plan



HOW TO: Use Social Media to Retain Customers



HOW TO: Write a Novel Using the Web



HOW TO: Choose a Smartphone for Your Small Business



HOW TO: Choose a News Reader for Keeping Tabs on Your Industry



HOW TO: Build Your Personal Brand on LinkedIn



HOW TO: Use Facebook for Professional Networking



Top 5 Business Blogging Mistakes and How to Avoid Them





Lifestyle Goals

It would probably give you a serious case of the Blue Mondays, but if you so desired, you could manage your entire life without leaving your computer chair. While we don't recommend becoming Boo Radley, Mashable does have a pretty sizable cache of stories that will show you how to shop, manage your finances and learn new skills — all from the comfort of your rolly chair.

HOW TO: Learn and Practice Languages Using Social Media



HOW TO: Use the Web for Socially Responsible Shopping



HOW TO: Plan a Vacation Using Social Media



HOW TO: Manage Bills with Social Media



HOW TO: Plan a DIY Wedding Using Social Media



HOW TO: Use Social Media for Better Health



HOW TO: Get More Responses in Online Dating





Fun

From satire to songs, the web is, to put it plainly, a fun place. Kick back with this list when you need a break from the grind.

HOW TO: Outsmart Phishers [HUMOR]



HOW TO: Survive Disconnect Anxiety [HUMOR]



HOW TO: Party Like Microsoft [Awkward Video]



HOW TO: Find the Name of That Song



HOW TO: Stalk Your Kids on Facebook and Twitter [VIDEO]





Bonus: Twitter

Twitter was the breakout success of 2009 and looks to be a vital tool for both professional and personal communications in 2010. In fact, we think Twitter is so important, we figured the microblogging site required its own run-down. If you're not yet hip to Twitter (how's the weather under that rock?) or if you just want to fine-tune your skills, check out these resources.

The Twitter Guidebook



HOW TO: Use Twitter Lists



HOW TO: Use Twitter's New Retweet Feature



HOW TO: Get Retweeted on Twitter



HOW TO: Create Custom Twitter Backgrounds



HOW TO: Find a Job on Twitter



HOW TO: Get the Most Out of Twitter #Hashtags



HOW TO: Use Twitter Hashtags for Business



HOW TO: Build Your Personal Brand on Twitter



HOW TO: Organize a Successful Tweetup



HOW TO: Use Twitter for Customer Service



HOW TO: Live Inside Twitter and Still Stay Productive



HOW TO: Start a Petition on Twitter





[img credits: Marcin Wichary, viagallery.com, webmove]