Times tables are always worth practicing. Little and often is best. 5 - 10 minutes of times table practice each day work wonders.
Make sure to practice times tables that you are unsure of. Don't just keep doing the ones you already know and try some mixed practice once a week, where different time tables are mixed together.
I have included some games to play online but also a Low Tech No Tech section - so you can practice a times table without needing the computer.
Low Tech No Tech
Write your times table out on to slips of paper. Put them in a jam jar/box/bowl. Ask someone to pull out a slip and ask the question - if you answer correctly keep the slip and award yourself a point. Otherwise pop it back in the jar to try again.
Recite your times table - make up a song or sing a song you know.
Write it out on a piece of paper - do it in order from 1x to 12x.
Challenge yourself and write it out in this order
10x, 1x, 5x, 2x, 4x, 8x, 3x, 6x, 9x, 11x, 12x, 7x
Write your times table out as division instead so - 1x8=8 would be 8÷1=8
Alternate with someone else - they say the first fact, you say the next fact.
Person A: 1x7=7
Person B: 2x7=14
Pick a times table - for example 6s
Roll one or two dice.
Multiply the number with 6.
For example - I roll one dice, it lands of 4. I say 4x6=24
Roll two dice - they land on 3 and 4 - I add the dice to make 7 and then times it with 6. I say 7x6=42
I have posted some simple games and activities that you can print out if you have a printer to play. Or maybe you could use one of them to make your own on paper.