When working at shifts from third position, it's really important to be able to hear which note you're aiming for in your head, before moving. Otherwise, it's a bit of a stab in the dark!
One way to help is to think of familiar tunes which use the interval you're shifting across, so I've put together this guide to help you. Do take your time with this: it's better to go slow and to be confident about what note you're aiming for, rather than rushing it and hoping for the best.
This is also a good opportunity to develop an awareness of how these different intervals are constructed, such as how minor intervals are always a semitone smaller than major ones.
(By the way, this sheet was made with LibreOffice, using the OOoLilyPond extension, which is a really handy way of quickly entering small musical fragments into text documents.)