I have a lot of DVDs that I want to watch on my iPod. Here is the question, I don't know how to put a DVD on iTunes, is there any easy way to do that? And I know a third-part DVD converter is required but i really don't know which one should i choose, any suggestion?
Here, we highly recommend you Cucusoft DVD to iTunes Converter, it can convert both DVD media and any video files to iTunes. With it, you can rip DVDs and convert videos to iTunes video (MPEG-4, H264), convert videos and DVDs to iTunes music MP3, put videos and DVDs on iTunes with great quality and fast converting speed!

Guide on How to Put a DVD on iTunes
Step 1: Load files
Run it DVD to iTunes Converter and load your DVD by clicking 'Open DVD' button or choosing 'Open DVD' from 'File' drop down menu:

Step 2: Profile select
Set the appropriate format as you like.
You can also choose other video formats: iPod, iPhone, Zune, PSP, Pocket P.C and so on.
Step 3: Output settings
Set your Audio/Video output Settings and tick appropriate parameters.
Step 4: Start Converting
Click the 'Convert' button to start converting. OK! How to Put a DVD on iTunes is so easy to you!
More about Cucusoft DVD to iTunes Converter Suite
Cucusoft DVD to iTunes Converter Suite converts DVDs and videos, so you can play them on almost any portable device including iPod, iPod touch, iPod video nano, iPhone, Zune, PSP, video-capable MP3 players, video-capable mobile phones, Pocket PC, etc.
It can convert DVDs and video files to almost any audio/video format including video formats H264, MP4, WMV, AVI, MOV, RM, 3GP, flv, SWF, mpeg-1, mpeg-2, VCD, SVCD, and DVD, and audio formats AC3, AAC, MP2, MP3, MP4, RA, and WMA.
Note: If you are a Mac user, just follow this guide How to Put a DVD on iTunes for Mac>>