here are some suggestions, hope someone will come up with more ideas:
1. extra long feeding time. so you can sit together with him, relax and have a cuppa ..etc.
2. extra long bath time. how about taking a bath together with him?
3. sit down on the floor, relax yourself. roll a ball, ask him to bring it back to you.... haha ... so he will be busy catching his ball and not clinged to you
4. DS loves my handbag. never seem to be bored with it. you can give him an old one and fill some items that are safe for him to play with.